Was watching a young fellow practice riding what I assume was a new to him fairly good size 4 wheeler out in a sports field behind work one afternoon. He started off just putt-putting around slowly on the level playing field then after a little while tried driving it down into about a 4' deep ditch and trying to get it to go back up the other side. The other side of the ditch was steeper and he couldn't make it climb all of he way up and out of the ditch so he kept giving it more and more throttle. Last time he tried he fired it up big time and came close to making it out too until it damn near tipped over backwards on top of him. Luckily it went back down right side up. I would imagine several hundred pounds of steel and plastic falling from that high and landing on top of someone probably could be painful at the very least.
