The reference is to a quaint little tounge-in-cheek movie called "The Princess Bride."
Haha! You fool! You fell victim to one of the classic blunders! The most famous is: Never get involved in a land war in Asia. Only slightly less well know is this: Never go in against a Sicilian when death is on the line!
HA HAHA HA! HA HA HA!
(thud)