They throw a BIG gloucester cheese down that hill ... then people charge after it ... and whoever get's down first wins the cheese ....
Me and a mate were thinking of doing it ... until we got there .... that hill is extremely steep ....
So much so that they had to delay the last race because they ran out of ambulances .... in every race people went away on stretchers .... it was mental !!!! 
defo worth going for a day out of town
I've got a movie of it, but my sites not up, will post it once I got my site up ...
.