I think of this every time someone mentions the size of Watson's cranium.Reminds me of a quote from "So I married an axe murderer":
Stuart Mackenzie: Look at the size of that boy's heed.(Scottish accent)
Tony Giardino: Shhh!
SM: I'm not kidding, it's like an orange on a toothpick.
TG: Shhh, you're going to give the boy a complex.
SM: Well, that's a huge noggin. That's a virtual planetoid.
TG: Shh!
SM: Has it's own weather system.
TG: Sh, sh, shh.
SM: HEAD! MOVE!