Now I’ve seen it all 
Ummmmmm…why?
OK, maybe not stunters, but playing footie on bikes has been going on for years, MCN or MCW used to have a weekly spot the ball competition featuring it.
i think the main reason behind it is for them to use it instead of the ‘last man standing’ at the comp in exeter this weekend and just for a bit of fun.! not my cup of tea though