there is a field next to our house and at the edge of the field there is a 10 foot bank that is part of our lawn... i like to go a little fast and go down the bank and it kinda slopes back up pretty quick so i can jump our driveway... one night it was wet and muddy and the brakes aren' t the best... i say i was goin about 40 and put the brakes on a little, they didn' t catch and my quad (honda400ex) launched off the hill and slammed front first in the pavement and rolled 4 times. I jumped off in mid-air and didn' t get hurt but i hit the driveway pretty hard and messed up my 4-wheeler.