One that I thought was funny was a solo piece by Paul Sand. He put on a record teaching him to be more outgoing. As he practiced the exercises, he became out of sync with the record. For example, the record tells him to tell a joke, so he begins but stumbles around trying to remember how the joke goes. The record laughs at the joke and then moves on leaving Sand bewildered as to why he can't learn to be outgoing.
If anyone ever tells you that you put too much Parmesan cheese on your pasta, stop talking to them. You don't need that kind of negativity in your life.