: Lowering an object into a film-covered water tank to apply a complex pattern.
The phrase often serves as a caption for viral videos or "oddly satisfying" clips featuring mechanics, chemistry, or craftsmanship. Put_it_in_and_watch_...e0wmur_3.mp4
: A frequent "long post" where a piece of gallium is placed on an aluminum surface (like a soda can or laptop), causing the metal to disintegrate. : Lowering an object into a film-covered water