So.. a man climbs 24 miles above the Earth, then freefalls at Mach 1.24 on the way back down again.
From my long forgotten A-level physics, I reckon that must've required a fair amount of gravitational potential energy.
But, where did that energy actually come from, originally?
Helium... floating up on lighter-than-air buoyancy, but from where, how??
How is The First Law upheld in this instance??