Here's an insanely scary ride for those who need to feel like they're close to dying in order to feel like they're living: the Sky Tower in Tivoli Friheden in Denmark. They hang you from a safety rope—then they cut it off and you free fall at 55 mph down onto a net 100 foot below. For fun.
The sensation of free falling to the ground from a 100 feet in the air with no safety rope or parachute attached to you has to rank in the top 10 for scariest feelings ever. Your life would definitely flash before your eyes and the seconds it takes to hit the net probably feels like hours.