Having learned welding last semester, I was mesmerized by the fluid phenomena that happened when melting metal with an arc. This particular film interested me because it clearly depicts the interactions between the electromagnetic field (depicted by the plasma in the arc) and the gas ejected from the welder. The solidifying of the metal is not as easily seen, but one can see the flux-cored electrode melting and dripping from the welder.
This video has a very alien feel to me, like a UFO depositing blob packages. Among the many oddly satisfying videos on the web, this one struck me as unique and inspiring.
This video comes from a project by Thomas Meier on hs-movies.de