A snail goes into a car dealership.

He finds the salesman and says, "I want to buy a Z-car with some custom features. I want the seats lowered, the pedals raised, and the 'Z' changed to an 'S'." Then he plunks down enough cash to make it happen.

The salesman writes down the order and then says, "If you don't mind me asking . . . I understand why you want the seats lowered and the pedals raised, since you're rather small. But why do you want the 'Z' changed to an 'S'?"

"Because," says the snail, "that way, when I'm zipping down the highway, people will say, 'Wow! Look at that S-car go!'"