A blond left her car out in a hail storm. When the storm was over she checked the car and found out it was covered with small dents. She went to the local garage and inquired how to fix the problem.
The mechanic told her to blow on the tailpipe and the dents would be removed.
She took the car home parked it and proceeded to blow on the pipe.
Another blond came by and inquired what she was doing, she told her she was blowing on the tailpipe to remove the dents.
The other blonde responded, "That's not going to work unless you roll up the windows!"