The chest had the double horizontal mark.
He had seen it once before, on the chest that had given him the vine arm and the water pouch. High value, he had decided then, though high value was a theory with two data points behind it and not much else. He went in slowly with his left hand, tested the floor, found nothing hostile, and reached in.
The main object was folded flat and strapped with two metal clips. He undid the clips and it opened in sections, locking out one after another the same way the vine arm had, each piece pivoting from the previous until what was in his hands was no longer a flat package but a recognisable shape. Low frame, two wheels front and rear, a narrow platform between them for standing, a handlebar assembly that clicked into the upright position and locked. Small, the whole thing, low to the ground, built flat and compact for storage.
He turned it over and found the fuel input on the underside of the frame, a capped port next to a small indicator window. Behind the window, a column of dark liquid. He tilted the scooter until the liquid settled and read the level. Somewhere between a third and half full.
The second item in the chest was a sealed canister, dense and heavy for its size, with the same port fitting as the scooter's input. He shook it. Full. He looked at both the scooter's tank and the canister and understood the ratio immediately: one canister, one partial tank, no indication of how far either would carry him.
He set the canister down and looked at the scooter.
The throttle was on the right handlebar, a rotating grip. The brake was a lever on the same side, which meant his right hand would be managing both. He tried the throttle without power and felt the spring resistance. Tried the brake. Both moved cleanly.
The left handlebar had nothing on it. Just a grip.
He looked at his left arm. The burn ran from wrist to mid-forearm, under cloth. The arrow was in the shoulder above it. He could curl the fingers of his left hand and rest them on the grip without much strain, but relying on that hand for any directional input or reaction braking was not a plan he trusted.
He found the start mechanism on the left side of the frame, a push-lever. He pressed it. Nothing. He pressed it twice quickly. A low sound came from the engine, a tick and then a hum, unsteady at first and then settling into something consistent, felt more through the frame than heard above the bridge's own hum. The indicator light beside the fuel window glowed a dull amber.
It was running.
He rested the scooter on the planks, both wheels down, and stood over it without mounting. Got a sense of the width, the weight distribution, how low the platform sat. Then he stepped on, right foot first, shifted his weight forward, left foot on. The scooter rocked slightly on the planks but the wheels held.
He turned the throttle a fraction.
The scooter moved. Not fast, a slow roll, but definite. He kept the throttle steady and the roll continued and he was moving across the bridge under power for the first time. The handlebar vibrated lightly through his palms. His right palm registered the vibration at the split. His ribs registered it too, a dull persistence on the right side that was not pain exactly but was not nothing.
He turned the throttle more.
The speed increased and the void on both sides blurred and he had not anticipated that, the way speed changed the peripheral experience of the drop, and his hands tightened on the bars without deciding to. He held the speed for three seconds, then braked. The scooter stopped faster than he expected. The deceleration drove his weight forward and his ribs met the handlebar and the ache spiked sharply before settling back to its baseline.
He stood with one foot down and breathed through it.
'Slower. And sit forward. Don't let the weight shift back into a stop.'
He ran three more test passes on the stable section before he committed to using it in earnest. Each one taught him something. The left hand needed to be on the grip or the handlebar pulled right under any lateral pressure, which meant he had to use the burned arm as a counter-balance even if he could not grip properly. His weight needed to stay centred and slightly forward to absorb braking without the ribs taking the full stop. The throttle had a range he was beginning to understand: enough to move at a useful pace without the peripheral blur that made the void feel urgent.
He also understood the fuel indicator better now. Each pass had moved the liquid column down slightly, a small but measurable drop. He compared the drop to the distance he had covered and did the rough arithmetic. One full tank, at the pace he was testing, would carry him perhaps two kilometres. Maybe less. The canister would double that. Four kilometres total, possibly, which was a number with no useful context because he did not know how far the bridge was and had no way to find out.
What he did know was that walking one kilometre at his current pace took something close to an hour. The scooter could cover the same distance in a few minutes. The fuel was limited and the bridge was not, and that was the whole of the problem.
He thought about it for a while, standing beside the idling scooter.
The rules settled into place on their own. He could not ride through sections where he needed to feel the planks underfoot. The floor drop had been invisible from above and undetectable at speed. The hollow resonance that had warned him before the combo trap was only readable at walking pace, one foot pressing deliberately before the other committed. Any section he could not walk through safely, he could not ride through safely. Probably less safely.
'Trap sections: walk. Clear sections: ride.'
The difficulty was knowing which was which before he entered them. He had been getting better at reading the walls and the floor and the general character of each stretch. He was not good enough at it yet to trust a decision made at speed. He would need to walk the first part of any new section until he had read it, then commit to riding if it held.
After topping the tank from the canister, the canister was not quite empty. He shook it, heard the faint slosh of a small remainder, and recapped it. He put it in the storage slot under the scooter's platform. Empty or near-empty containers had moved on the marketplace before. He had no particular reason to leave it behind.
The opportunity to ride arrived an hour later.
A long stretch of bridge, walls pulling back to their widest separation, holes sparse and in the distributions he had learned to read as low-risk. He walked the first hundred metres on foot, testing planks, watching walls, finding nothing that changed his assessment. Then he walked another fifty because the bridge had been wrong before when he had thought it safe, and the last time that had happened he had survived by accident and not design.
Then he started the scooter and rode.
The first thirty metres were the same careful roll he had been practising. Then he opened the throttle and let the speed build to the range he had decided was usable, fast enough to cover ground but below the threshold where the void blurred. The planks moved under the wheels in a steady rhythm, the joins between them producing a faint percussion that travelled up through the frame. His ribs noted it. He managed it.
The bridge moved past him differently at this pace. The grey distance ahead contracted faster, the railing posts marking time in quick succession, the walls sliding by with a continuity that walking had never produced. He was covering in minutes what had taken him hours before. The same bridge, the same grey light, the same hum in his chest, but the rate at which it consumed him had changed.
He watched the walls. He watched the floor ahead of the wheels. He kept the throttle steady and his weight forward.
A wall hole appeared on the left, then another, the distribution tightening in a way that had preceded trouble before. He braked, absorbed the deceleration forward into his arms rather than his ribs by anticipating it, and the scooter stopped. He stepped off and stood beside it and pressed the nearest plank with his foot.
The plank had the fractional extra flex.
He walked from that point, pushing the scooter beside him, its engine switched off, its weight a new variable on terrain that required his full attention.
When he had cleared the section and confirmed two hundred metres of stable planking on the far side, he checked the fuel level. The ride had cost him perhaps a tenth of the tank. He looked at what remained and looked at the bridge ahead and thought about the canister he was carrying and did not feel that the math was in his favour, but the math had not been in his favour since he stepped onto the bridge and that had not stopped him yet.
He started the engine. Found the pace he had settled on. Kept his weight forward and his left hand light on the bar and his eyes on the walls and the floor and everything that moved.
The bridge went past him at its new speed. The traps ahead were still there. He was simply arriving at them sooner, which was either an advantage or not, depending on what they turned out to be.
He had not decided which yet.