Try humping multiple kilometers through mountain ranges on provigil on a 3-day training mission. It was one of the worst things I've had to do. Being tired and being in a state of living death because of drugs are bad. Drugs are bad, kids, mmmmkay?
I've done this not on drugs and the state of living death still comes on eventually during the long (20+ K) marches. Man was not meant to march dozens of miles with 80+ lbs on his back.
