Only posting because I don't see any other comments saying it:<br>A 70Kg person gaining 1000mph would gain about 7000000 J of kinetic energy. Google tells me that a current US can of Coca Cola contains 140 kCal, so you'd have to drink about 12 cans of that. Not terrible, but you'd be a bit gassy for a while. I'd probably do it in several smaller jumps.