Back in college I took a class each year through ROTC that was “adventure” type stuff. Learning basic rock climbing, rappelling, etc.
The best one was rappelling off of a helicopter. All the other rappels we did made me nervous as you edged over the top of the cliff, or built up the near to get on a rope tied off to an i-beam in the ceiling of the gym.
In the helicopter it was just the guy in uniform barking “go,go,go! (or whatever it was) and off you went!
For me helicopter rappelling made me more nervous than buildings or cliffs, but the excitement was more invigorating.
We used the old swiss seat which cost an SAS guy 2 crushed ankles.