i dont have a quad anymore. but when i was like 16, i was ridin around some man made dirt hills by my house. they were doin some kind of construction, and there was like 30 hills of dirt, each about 6ft tall. the dirt was really soft and i didnt think much of it. well one time i tried to go up one, my foot slipped off the thing, and it went straight for the spinning rear tire. it sort of twisted inwards so it ran over my foot sideways. luckily, the dirt was soft so i didnt get hurt at all, but since the shoe was a slip-on, it landed about 30ft behind me lol