Me: It hurts when I stand up or sit down, the front of the kneecap…
Doc: I see.
Me: Also, there’s this squishy bit in here that moves around. What is it?
Doc: (moving squishy bit around in my knee) That? It’s a bit of rice noodle.
Me: Wha?
Doc: Ha ha! Just joking. It’s gristle.