How do jetpacks work?

The first challenge with the design of any jetpack is how to get the pilot off the ground without burning his legs off below the knees.

How Jet Packs Work

How do astronaut jetpacks work? - Quora

How do astronaut jetpacks work? - Quora

The Future Today: Robot Jetpacks in the Works

The Martin Jetpack Nearing Commercial Release

JetPacks JetPack Aviation

How do jetpacks work in space? - Quora

Inside Gravity's daring mission to make jetpacks a reality

Water jetpowered flight - PressReader

Inside Gravity's daring mission to make jetpacks a reality