The idea is, you unravel part of a roll of toilet paper, toss it out of the airplane, then cut the line with your wing. This is by far the most fun I've had with my pants on.
Safety comes first! But if you're questioning the legality/risk, please note:
Proper steps were taken to ensure that I did not cause a hazard to anything below me. I've had proper training to ensure that I do not exceed the capabilities of the aircraft. I was wearing a parachute. And the toilet paper is bio-degradable.