I cycled the emergency lock into the doughnut, unracked a pack and a jumpsuit that looked like it would fit me, and suited up. The packed whined as it powered up and ran through its diagnostics. I checked the idiot-lights to make sure they were all green, feeling like a real man of action, then I stepped into the exterior lock and jumped, arms and legs streamlined, toes pointed.

The jet-pack coughed to life and kicked me gently, then started lowering me to the ground. The emergency beacon's idiot-light came on, and I heaved a sigh of relief and got comfortable.

The flight was peaceful and dreamlike, a slow descent over the gleaming metal city. I was so engrossed with the view that I didn't see the packjackers until they were already on me. They hit me high and low, two kids about my age with tricked-out custom jet-packs with their traffic beacons broken off. One snagged my knees and hugged them to his chest, while the other took me at the armpits. A voice shouted in my ear: "I'm cutting your pack loose. This is a very, very sharp knife, and when I'm done, I'll be the only thing holding you up. Don't squirm."

I didn't even have the chance to squirm. By the time the speech was finished, I was separated from my pack, and I spun over upside-down, and watched it continue its descent, straps dangling in the wind. My hair hung down, and blood filled my head, reawakening my headache. Reflexively, I twisted to get a look at my kidnappers, but stopped immediately as I felt their grips loosen. I squeezed my eyes shut and prayed.

The three of us dove fast and hard, and I tasted that second helping of breakfast again before we leveled off. I risked a peek, then squeezed my eyes shut again. We were speeding through the lower levels of Greater Salt Lake, the unmanned freight corridors, impossibly claustrophobic, and at our speed, dangerous.

We cornered tightly so many times that I lost count, and then we slowed to a stop. They dumped me to the ground, steel traction-plate. The wind was knocked out of me, and I was barely conscious of the hands that untabbed my jumpsuit, then began methodically turning out the pockets of my clothes.

"What the hell are you wearing, kid?" one of them asked. It was the same one who'd warned me about squirming. Hearing his voice a second time, I realised that he was younger than I was, maybe ten or eleven. Even then, it didn't occur to me to fight back — he had a knife sharp enough to cut through the safety strapping on my pack.

"Clothes. I'm from 1898 — my Pa's an ambassador. I don't have any money." I struggled into a sitting position, and was knocked onto my back again.

"Stay down and you won't get hurt," the same voice said. It was young enough that I couldn't tell if it was a boy or a girl. Small hands pressed into my eyes. "No peeking, now."

Another set of hands systematically rifled my coat and pants, then cut them loose and gave the same treatment to my underpants and shirt. I blushed as they were cut loose, too.