A blonde woman was driving her car home one night when she suddenly found herself in the middle of a hailstorm that dented her car horribly. The next day, she took her car into a garage to have the dents examined.
The garage owner, noticing that she was blonde and rather dim-witted, decided to have some fun. He told her to blow into the exhaust pipe of the car really hard when she got home, as this would cause all of the dents to pop out.
When she got home, she started blowing into the exhaust pipe as hard as she could over and over. Just then, one of her blonde friends showed up. Her friend saw her blowing into the exhaust pipe and was quite startled by the action.
“What are you doing?” she asked.
The first blonde told her the repairman had instructed her to blow into the exhaust pipe real hard so that the dents would pop out.
“You’re such an idiot!” she exclaimed. “You need to roll up the windows first!”