Were you aware?
store.valvesoftware.com/productshowcase/productshowcase_HL2HeadCrabHat!.html
(Ishamael and his missus said, "Zombie GOASTS, leave this place", Fri 11 Jan 2008, 18:15, archived)

I'd prefer
a mudkip hat if I'm honest. Apparently they're about somewhere on these here tubes.
(Mr. Ilby, Fri 11 Jan 2008, 18:16, archived)