A blonde gets in an accident. She takes her car to a body shop to get the dents fixed. The car mechanic decides to have a little fun with her. He tells her, "Well, Miss, it's gonna cost you $2980 for us to fix your car." He looks around furtively and beckons the blonde closer. He whispers in her ear, "Don't let the boss know I told you this, but you could fix this yourself for nothing."

The blonde says, "Really??? How?"

The mechanic, thoroughly enjoying himself, tells her to take the car home, to put it in the garage and let it cool off, then put her mouth around the tail pipe and blow really hard. "This will pop out the dents," he says sagely.

The blonde thanks him profusely, then drives her car home and has lunch while the tail pipe cools.

Sometime later her older sister comes home (also a blonde), and discovers her sibling on her knees behind her car blowing for all she's worth. "What the Heck do you think you're doing?" she asks incredulously. Her younger sister explains what the mechanic told her.

"You dummy!" she exclaims. "That will never work! You've got to roll the windows up first!"