my chain snapped yesterday and jammed in the rear cassette and the result was very much like being thrown over the top of the handlebars
I suspect it is driving down onto the pedal, the pedal doesnt move so all the force is upwards and because you arent expecting it... over you go![]()
He was waiting at traffic lights, they changed so he stood up on the bike to get ahead of traffic then the chain broke and he went over the handle bars... So he wasn't moving much I guess? More like he was leaning forwards and suddenly "solid platform" (as you mentioned, with pedal he was standing on gave-way. I'd imagine you would just kind of whack your arse on the seat though if that happened...