An attratctive lady pulled her car into the garage for repair.  She wasn't sure what the problem was and she asked the mechanic check it out.  The garage was across the street from the zoo and she said she would eat her lunch at the zoo and return in about an hour.  An hour later she came back and the mechanic said he had diagnosed the problem. "Lady, it looks like you've blown a seal." "Oh no," she said, "that's just a bit of mayonaise from my sandwich."