A buddy and I were golfing one afternoon and getting somewhat bored with the round; so when we came upon the water hazard with two ducks sitting quietly on the water, I bet him ten bucks he couldn't hit a duck and five dollars he couldn't even get one to move.  

Being a guy, he took the bet. He launched four shots toward the ducks, and even threw two by hand, and the ducks still wouldn't budge. Only after he lost six brand new golf balls did he realize the ducks were decoys.