Serious face cake-age, here....kinda feel bad for the contestants but visually spectacular and re-played in SLOMO!
Both are really pretty girls...the first is super pretty and has the good-sport personality to match -- kind of like that pretty cheerleader who was on Distraction (American version) several years back....she seems game for anything.
The show has other penalties including a drop-slide into a shark tank (yes, with a real shark - I'm guessing there's a glass wall separating the loser from the shark, or, it's been de-toothed)...also: giant 'sandwiches' that smoosh the loser between slices while getting squirting with ketchup (no aftermath, but really funny sight gag)
Here's another SLAGROOMTART-ING (2 girls) where the 2nd blond gal just knows it's coming, spreads her arms (Jesus like) and takes it all full frontal!
I honestly wouldn't know where to begin. Although I suspect it's like any other catapult, and a bit inconsistent for accuracy. Probably easier to just throw a cake at a model myself. (Never tried, seems like there's potential for injury....)
I really wish I could have something like those Japanese pie cannons.