A Tony Stark-style jet suit
Jetpacks have come and gone over the years, usually stymied by short flight times and the sheer danger of strapping jet engines to the human body. With a design closer to Iron Man’s suit than Flash Gordon’s pack, Gravity uses a trio of precisely controllable kerosene-powered microturbines—two of the breadloaf-sized engines on each hand and one on the back—to generate a stable “tripod” of thrust totaling 1,000 horsepower. The suit carries enough fuel to fly for up to 8 minutes.