Vital Football Legend
Other than a terrible idea, it was a sort of physical game show - people stood on a beam across a pool of water, and a moving wall of foam with a hole cut in it would come at them. They had to fit through the hole as the wall passed or else be pushed into the water and lose. I think the hole varied and they only saw its shape as it came through some curtains so they had to quickly work out how to fit. God knows what the point was though!