Ollie hears that Sven just bought a new truck, so he goes over to take a look at it. When he gets there, he sees dents all over the truck, and Sven sitting in the driveway behind the truck. … …

Ollie says, “Sven, why did you buy a truck with dents?” …

Sven says, “Oh, I made a real good deal. It got dented in a hailstorm, so the salesman gave me $50 off the price. And he said that all I have to do is вlоw on the tailpipe, and those dents will pop right out. But I’ve been sitting here blowing on this tailpipe for two hours now, and I don’t think it’s working.”
Ollie says, “Sven, don’t be such a duммy! You have to close da windows first!”