Me: I have an arrow in my head.
My friend: What's the point of that?
Me: Of the arrow?
Friend: No!
Me: Probably the flint.
Listen up, you chucklehead! The "me" character has an arrow stuck in their skull and the friend asks what the point of that is, implying there's no reason for it. But the "me" character thinks the friend is asking about the pointy part of the arrow, which is flint. Get it? You probably don't, you're probably one of those people who still think the Earth is flat. Ba dum tss!