Field lines that should never cross break and re-join in a thin current sheet, dumping stored magnetic energy into particles in seconds — the engine of a solar flare, of the aurora, and the thing that keeps stalling tokamaks; each hit snaps a new X-point.
Drawn with: a WebGL2 shader.
Reacts to and looks like: gpu, webgl2 and audio-reactive.
Family: Visualiser.
Runs in your browser. The preview above is the same program the renderer uses.