Smoking is bad for you! But let's be honest, smoke itself looks sorta cool. Here's a video of smoke looking like liquid, which makes it even cooler looking. You can even swirl the smoke around and pour it out like water.
To get that "liquid smoke" effect, the guy used an unfiltered cigarette (or joint for thicker smoke) and a cold glass. The key, he says, is to not breathe as you release the smoke into the cold glass or it'll throw things out of whack. The cold glass supposedly cools the smoke and makes it settle under the warm(er) air, which allows it to take on liquid-ish properties. Cool! Until someone gets cancer. [Reddit via Geekosystem]