I was riding north on Fair Oaks in Sunnyvale today, and around Tasman avenue I noticed another bike rider ahead of me. Cool. So, as I get closer, I notice the guy's "paddling" on the curb with his right foot to go, that's kinda weird. As I get closer, the guy gets off of the bike, runs with it to get up speed, then jumps on, and falls down on the road! He's over on his side, on the asphalt, then gets up, back to paddling, as I pass the guy I take a quick look, and ... no chain on his mtb!
It's a kind of "skateboarder" looking chubby-ish caucasian teenager, I kind of went smoothly by prepared for a very smooth all-out sprint if the dude tried to catch me for some reason, the guy was acting like he was either one something, or crazy with rage for some reason. I get to the onramp for 237 and wait for the light to change, the guy's made it up the hill and is almost up to me, shows no sign of aggression toward me and no sign of wanting my help either, so I smoothly got my 48x16 outta there.
I know no brakes is hardcore, but this guy was going back to the "draisine" proto-bike days with no drive system!