You see the word insane get thrown around on the internet a lot. It's a good word! But few things actually deserve the word insane. This stunt does though. Felix Baumgartner (the dude who jumped from space) pilots a Bolkov BO105 aerobatic helicopter that is basically having a movie car chase scene with a race car and forgot he was piloting a helicopter and not driving a car.
The chopper and the car get so ridiculously close to each other so many times that you can't help but squeal. Insane.