This is really just for slamm/beatz... come on, you must've taken a photo of your finger in a before and after type thing! You've got to show us.
And seriously, we were all surprised you did it... doesn't everyone know about the Sheldon Brown warning? If not, here's the tip:
The other danger of fixed-gear bicycles is at its greatest when the bike is in a repair stand. If you hand-pedal it and then accidentally have a finger an article of clothing come into contact with the chain or a sprocket, the momentum of the wheel will keep the drive train rolling. You can lose a finger that way.
Sorry to gross you out with these photos, but this is a real danger!
Does it look like one of those?
I've only got a few scars from cycling. One on my left palm when I attempted a wheelie on an old Grifter about 20 years ago... the bike was too heavy so I decided that hitting a curb would give lift to the front... it did... for about 2 seconds... and then the back wheel hit the curb. I went straight over the bars and landed in gravel, with a stone embedded in my left palm.
The only other scar is now barely visible on my right fore-arm. A chunk of muscle that got dug out by the bar-end of another cyclist. I was going too fast, he was going too sideways. It was a bad recipe. It also resulted in my right shoulder having some ripped ligament/tendon things... it was painful, but no scar for that bit. Just 3 months of physio.
Oh, one more scar... right foot. Happened at Box Hill during a Surrey Hills ride. I'd been out drinking the night before and went along for the club ride. Very tired, bonked shortly after Box Hill, but the real sign of the bonking was falling off attempting to mount my bike in the car park of the café. I went straight over the bike and landed on my face. To this day I don't know how I did that. Nor do I know why feet scars never seem to heal like the rest of the body does.