For those of you who doubt British TV, I give you: Get Your Own Back.
This used to be a wonderful childrens TV show where a kid can nominate an adult (be it their parent, teacher, sibling etc) and they put them through a series of tests as a sort of revenge against something the child deemed unjust (aka, making them tidy their room or take a test).
The finale of which is called “Gunk Dunk”, seen above. Every question the child answered correctly, the adult moved up a notch. Once at the top, the child then gets to pull a lever and that adult gets gunged!
Not gunna lie, this show was the best damn thing in existance. Someone took one of my teachers onto it once and let me tell you, it made his maths lessons from hell just that little bit easier.