Monkey Island 3 (Curse of Monkey Island) Easter Egg - Trapped Hand

In the Goodsoup family crypt, go to the far left to the crack between the crypt and the gravedigger's hut. If you USE the crack, Guybrush will stick his hand in, then take on a faux-German accent and say, "Aaaiii, my hand is stuck! You'll have to cut it off!"

This is a reference to The Dig, where the character Brink does exactly the same thing, and you do end up cutting off his hand..