Record-breaking domino chain at the Seattle Public Library! Time-lapse photography shows the set-up. Over 2000 books go down. I particularly like the picnickers’ tableau! Thanks, BoingBoing.
Similarly, at the Colorado School of Mines in 2017:
https://www.facebook.com/arthurlakeslibrary/videos/1028789033920896/
(Thanks, Anita Pariseau!)
Oh, what a joy!! I loved the stair-step effects, the human tableaux, the cool slapping sounds of the books! I noticed some color coordination in there, too!