A blonde walks up to a Coke machine in a Las Vegas casino, puts in a few coins, and out pops a Coke.

She puts some more coins into the machine, and another can of coke pops out.

She keeps putting in coins, and cans of coke keep coming out.

A guy walks up behind her and says, "Can I please use the machine?"

"Go away!" She says, "Can't you see I'm winning?"