Crashes are an accepted risk in motorsport. Indeed, for some people they're the sole reason for watching.
Sometimes, of course, crashes are really spectacular, with cars flustering through the air like demented metal chickens. Two such incidents have been caught on camera recently - behold, the cartwheeling Mini that unbelievably didn't kill anyone as it leapt over the barriers:
...and what fresh hell is this? Keep an eye on the rear-view mirror at 1m10s.