Where is John Cleese when you need him?

Some of what the Monty Python crew did was very funny stuff. Of course, like most sketch groups, some of what they did resembled humor only insomuch as it was done by the same people who did the funny stuff...

One of the classic quotes, and I must admit I do not know which sketch it was from, was John Cleese bellowing, "I fart in your general direction." Who knew that could be considered assault?