With the flip of a lever there was liftoff in the form of a colorless flame, and disbelieving laughter. No need for two fuel tanks or a complex ignition system; hydrogen reacted violently with oxygen.
It was a funny little element. One asocial proton and a lonely orbiting electron.
It was also the lightest element in the universe; seven percent lighter than helium, and burned brilliantly at the centers of stars all across the galaxy.
For her purposes, though, it reduced the weight of her weapon by fifty-some kilograms and made gravity an obsolete boundary. Hydrogen didn't simply defy the laws of physics, it spat in their face and called their collective mothers a whore.
All it took was a good start from a fair distance, and Katerina ran up the side of the Main Wing like a spider up a plaster wall, hovered in mid air for a few moments like an indecisive butterfly looking for the perfect flower, and dropped onto the roof of the building.
A few months of tinkering in room 307 produced a hydrogen-fueled jet pack with a shortened wingspan and increased range. With it came improved mobility and implementation of new technology from the West -- a thin, body-skimming flameproof suit replaced asbestos and vulcanized rubber and was more effective at regulating the wearer's core temperature; a gold-leafed face mask with a built in respirator eliminated the need for a heavy smoked glass helmet.
The Fury hadn't invented a better mousetrap, but rather, a better cat.
The woman turned and ran across the roof of the Main Wing, up and over the ledge, bridging the gap to the Administrative Wing in one impossible jump. The landing was a little rough, and she only caught herself at the last possible moment to avoid tripping and landing most unceremoniously, sprawling on the roof.
She was upright and nothing was on fire, so that was good.
Thrusters deactivated, she collected her thoughts and pulled off the expressionless mask that lent itself to nightmares about Venetian demons. The day was overcast and smelled like rain, but her view thus far had only been bronze-hued.
With a sound of pondering, she pulled a small notebook and pencil from the breast pocket of her suit and began scrawling a few notes, pacing back and forth as she wrote, murmuring to herself as though no one was watching.