I knew a guy who when he was in his teens came across an unattended idling police helicopter and decided to jump in. He actually got the thing off the ground for a few seconds before setting it back down and facing a bunch of very angry cops.
He got lots of community service for that one.
For a while I didn’t have a car. I had a helicopter. There wasn’t any place to park it, so I just tied it to a lamp post and left it running.
Stephen Wright