Not yet. (we aren't counting dirt bikes right??) 9 years on a bike and I haven't had it down yet. But then again Im a wuss. I had my F4I for a whole summer and I think the front wheel was off the ground twice. My friends call me "grandpa" cause I ride like and old man. I guess Im ok with it I just hope that if I do go down its my fault and not because car pulled out or cut me off or anything. Im not too scared of laying it down since I ALWAYS wear leathers but if you get hit or hit a car or truck leathers might not do much. I did watch my dad go down right in front of me. We came to a stop sign, and the road we were turning on to had a big curve just up the road from us. He looked and didn't see any traffic so he started to go. Then a car came around the corner so he decided to wait since he knew I was behind him. grabbed a handfull of front break and the front tire was on gravel or something and just went sideways on him. I don't even think he was moving when it hit the ground. No damage to the bike or him so it turned out ok, just had his pride hurt a little but that heals.