This one seems to revolve around the principle that contestants have to climb a flight of stairs - which has been liberally coated with a very slippery substance - to 'rescue' some 'victims' trapped in a 'fire'. The first video clip shows how they go about it.
The second clip shows the hosts (and others) at the top of the stairs, bombarding the 'rescuers' as they try to climb up!
Looks like a good - albeit painful - time was had by all . . .