The Castle nut came off and that happened with that little kid riding it lol luckily he was going slow lol (thats my little bro, he thinks he is cool with that bad ass warrior) LOL
But the 2nd time it happened it happened to me during a race! haulin ass into a turn lower a arm dropped down and caught threw me over the bars and it flipped a few times and screwed it up some what! lol Pretty fun though!