Originally Posted by Redlemon

The joke is (and there's nothing like explaining a joke to kill it completely) is that you hear the beginning of Rat's joke, and you are thinking it is a joke like the 10 Inch Pianist. So, as the joke is being told, you are trying to figure out what mistake he could have made in his request that he ended up with a great big round orange heard. But nope, he asked for it directly.

That's the joke, dissected and pinned to the wall. Dead.