“What if I jumped out of an airplane with a couple of tanks of helium and one huge, un-inflated balloon? Then, while falling, I release the helium and fill the balloon. How long of a fall would I need in order for the balloon to slow me enough that I could land safely?” IfsNeedsLongEnoughOrderFallLandHugeCoupleReleaseWhat IfAirplaneTanksBalloonsHelium Author:Colin Rowe
