My best friend from high school was driving this early-70's Pinto. I was riding shotgun, and unbeknownst to me, the door was held closed by a bungee cord and a prayer. Also, there were no seat belts.
Well, he takes a corner doing about 30, the door flies open, and I fly out. Musta skidded about 10 feet on my ass over the asphalt. The 3 passengers in the car actually thought they had run over my head, but luckily I skidded far enough to avoid the car as it came round.
I can tell ya though, it must have been a month before I could walk normally again, and a year before I fully regained sensation on my left ass cheek. A little patch of grass would have been nice.
