@Kop5: ha! Been there, done that! I had a rip in the crotch of my pants one time, and after a drop I went to kinda stand up on the pedals but my pants had kinda grabbed the seat thanks to that hole in the crotch. I was riding clips that day, and I hit the drop perfectly but right afterwards I fell over lol.
I ended up saying f*ck it and stuffing my pants in my pack and riding in my boxers lol. This xc chick that was out riding sniped some pics of me and posted em online, which my buddies later saw and called me, laughing their asses off haha. Good times!!