Last night I'm riding my steel bike on the trainer as I watch the World Series. Everything's fine until I take my hands off the bars, sit straight up to stretch and my seat clamp gives way allowing the seat to shift nose straight up. I lose my balance, and slide back down over the seat, my rear hits the back wheel (got a single, thin tire burn just to the left of my backside center line, if you know what I mean). My feet are clipped into the pedals, so as I hit the floor, I bring the entire bike down on top of me. There I lie with the bike still in the trainer with the whole thing upside down and on top of me, my feet still clipped to the pedals. My oldests son turns from watching the game and says, "Hey, aren't you susposed to keep it muddy side down, clean side up?" It must have been the perfect thing for him to say, because instead of cursing, I just start laughing as I try to get myself untangled from this whole thing. No serious injuries or damage to the bike or trainer. Lesson learned... check the seat clamp every once in a while to see if it's still tight.