ShanksFX mit einem Supercut meines Lieblings-Effekts aus den 80ern: Wolkeneffekte aus sogenannten Cloud Tanks. They just don't make shit like this anymore.
A cloud tank consists of a bottom layer of salt water and a top layer of fresh water and when various forms of liquid are injected into tank, clouds are produced. This was the common technique that Hollywood used for decades to capture supernatural weather. This video is a compilation of as many cloud tank examples as I could think of.
Youtube: Cloud Tank Magic | Shanks FX | PBS Digital Studios (via Jason Kottke)