Today's Inconceivable "Villain of the Day" is
(from Princess Bride!)
"Ha ha! You fool! You fell victim to one of the classic blunders! The most famous is never get involved in a land war in Asia, but only slightly less well-known is this: never go in against a Sicilian when death is on the line! Ha ha ha ha ha ha ha! Ha ha ha ha ha ha ha! Ha ha ha... *ack!*"
Read the entire classic brilliant scene here.