Favorite Stupid Sign

[Whit]

     You know those signs or, perhaps more accurately warning labels, that exist only for the really stupid? The most famous at this point is probably "Coffee served HOT!" You read it and think, "How dumb does a bastard have to be to not know that without reading it?" We all know it's just to prevent lawsuits, but I'm always amazed at the variety of these signs.
     I think my favorite is the one on Coke/vending machines; "Do not rock or tilt. Injury or death may occur." That's not that funny in and of itself, but the picture that usually accompanies it of a guy standing next to a machine that's falling over with the little lines over his head, that have to be shorthand for "OH SHIT!" makes me laugh. Should it be funny? Probably not. But if that's the case then the Darwin Awards shouldn't be funny either...
     So, what are your favorite stupid signs?