I put a new tire on the front of my SM. Aparently the tube had a slow leak. got on it the next day, warmed it up, took it a little slow then hit my wheelie road to work and sent it up. front tire stopped in the air like it usually does when you wheelie for a mile. went to put it down and i could feel the rim bottom out, shit went nuts and did the same thing u did. I went back and there was a giant foot ball shaped skid from putting the wheelie down then looked like someone took a big sharpie and drew a tail on it. lol
Yep, rocky trails and shit will get you good at letting the bike ride where it wants to go. catch a nice 4 inch tall rock on the side of a tire when your leaning will send you. fun shit isnt it.