A blonde in Las Vegas goes up to the Coke machine, puts in a dollar, and gets a Coke.

She puts in another dollar and gets another Coke.

She puts in another dollar and gets another Coke.

She puts in another dollar and gets another Coke.

Finally, the man behind her says, "Hey, lady. Do you think I could use the machine?"

She replies, "Fuck off! Can't you see I'm winning?"