Here's a Monty Python clip you may not have seen. It's from a special episode they did for Dutch TV in the early seventies — a slapstick sketch that Mssrs. Jones and Palin performed in their pre-Python days and which the Python's resurrected for this special and some stage shows.
It ostensibly teaches about hitting someone in the puss with a pie but breaks a cardinal rule, which is that you never put the pie filling in a paper plate…or worse, a tin one. A throwing pie should be put inside an actual pie shell that is brittle enough that it will break apart when it comes into contact with a face. That way, you don't have the pie plate hanging there on the person's head. You'd think people would know important stuff like this.