Domino master Hevesh5 spent 25 hours over eight days to create this triple spiral consisting of around 15,000 dominoes. As you watch the three sequences of the fall, the intricacy of the build becomes clear.
How does she control each sequence without ruining a future sequence? That’s some engineering, to go along with the patience, steady hand, and creativity involved in this couple of minutes of video. It is a very satisfying video, so should be worth the effort if enough people watch. -via Metafilter
Bonus: Watch it in reverse!