i had one, not too long ago. it wasnt too bad though. me and my gf's brother went for a ride. he was on his dirt bike, i was on my gf's 4-wheeler. we went down to the end of the road, no problem. then ,on the way back, things got ugly. i went racing by my friend, and i cut in front of him. i guess i cut a little too sharp. he stated screaming at me, so i turned to look, and i jerked the handlebars. i felt it start to tip, so i instinctively grabbed the brakes(bad move). i fell off, and landed on my head. the 4-wheller flipped over me, and landed in the ditch, on its wheels. i blacked out somewhere in the process, cuz when i got up, i asked my friend what happened.

i got some really nice cuts, and i bruised my hip, other than that, i was ok.

bad thing was, was that the 4-wheeler was my girlfriends b-day present, and she'd had it for less than 2 hrs.