a few days ago i was out on a relatively short ride and i hear what sounds like a really loud buzz. all of a sudden a hear a quiet ping sound and then when i go to upshift the ENTIRE rearset pivots upward on the one remaining bolt!!!! so i pull over off the road and realize that one of the bolts that holds the rearset on has fallen off. i was just wondering if this has happened to anyone else here. if it has that is pretty lame and could be potentially fatal if it was a different bolt somewhere else.