To begin the contestants have to roll a giant die. The number they roll tells them which hole in the cake they must get into.
Hole one is the closest to the 'Pie-Chucker' while hole six is the furthest away.

Once in a hole the contestant has to lower the lid so that only their head is sticking out. Now the 'Pie-Chucker' throws a custard pie at them. If they get hit, and covered in cream, they're out, but if the pie misses them, or they hardly get any cream on their face, they win.