Why don't aliens eat clowns.
Because they taste funny.
According to a poll commissioned by 20th Century Fox - The Best Movie Weapons in History
#1 - The Light Saber from Star Wars
#2 - .44 Magnum from Dirth Harry
#3 - The Whip from Indiana Jones
#4 - The Samurai Sword from Kill Bill
#5 -The Chainsaw from Texas Chainsaw Massacre
Here's a few I think were left off the list:
Bruce Lee's NunChuks, Chuck Norris's entire body, machine gun from Scarface AND the Fembots from Austin Powers!!!