So... I was playing with Water and Lava recently, and discovered how to make a Smoke Machine!
Here's the tutorial:

1: Make a small Vat with a 6x1 space inside
2: Put Lava at one end, let it flow a bit, then put Water at the other end.
3:Place a Lever near it (For manual cranking)
4: Make a Redstone clock next to it
5: Make a wire trail from the clock to the block where the Lava and Water collide.

Voila!



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