A polar bear was out driving one day when he suddenly started having engine trouble.
He pulled into the next service station and asked the walrus there to take a look at it.
The walrus drove the car into the workshop and put up on the hoist.
After looking at it for a bit he returned and said to the polar bear, "You’ve blown a seal", to which the bear replied, "No, honestly! That’s just mayonnaise from lunch!"