During the scene in Alice in Wonderland where Alice has to get across the moat to the Red Queen's castle...
"Hmm, look at those rocks. Wait, they look like weird mushrooms... Hmm, they seem to rock in the water whilst she crosses. Are they floating rocks? Hmm... Wait... They're heads! Oh my God! The Red Queen dumps the heads in the moat! What's up with that?!? Eww!"
It's the only Alice in Wonderland thing i've seen where people really do lose their heads.