Rans Enduro Sport, Hase Kettweisel Tandem, Merin Bear Valley beater bike
I haven't seen it with a fixed gear but, working in bike shops, I've had bunches of little kids get a finger caught between coaster brake chains and sprockets. In every case that I've been personally the kid has stopped before they got too seriously hurt but they couldn't get their finger out because the coaster brake won't let it turn backward. It usually requires a 15 mm wrench to loosen the chain tension while mom looks on in horror.
If you can still make the sale after that happens, you're good.
My baby brother did last week! I had my bike upside down because I doing some stuff and I walked away for a few minutes to get some things. Soon after I left we hear him scream. He played with the pedal and turned the wheel a little while his hand was on the chainring right near the chain. Lucky the wheel didn't turn very much or else he would have had more than just a cut and pinched finger.
Originally Posted by Scrodzilla
I'd rather ride a greasy bowling ball than one of those things.