Did the smoke on Mystery Machine come out of exhaust pipe or windows Scooby-Doo?

The smoke from the Mystery Machine in Scooby-Doo actually comes from both the exhaust pipe and the windows!

Here's why:

* Exhaust Pipe: The Mystery Machine is a classic van, and like most vehicles, it has an exhaust pipe that releases smoke when the engine is running.

* Windows: For dramatic effect, the smoke is often shown billowing out of the windows as well, especially when the van is speeding away or driving through a spooky scene.

So, it's a combination of both for that iconic Scooby-Doo effect!