Well i heard a rattle coming from the board on the first run so i tightened everything down and on the second run i was doing some craving to slow down and the board slipped out from under me. I heard that rattle right before i fell but if the cup had broken then the (front) truck would of cut one direction and possibly rolled, so i assume i washed out and the wall is what did it. I also have to give some credit to my roommate slamming the hell out of it into a curb a week ago.