() Domino Spiral

Or Half Tau mark the day, I’ve made my biggest spiral using a formula with Pi, I estimated the total dominos in this spiral to be dominos. I counted the dominos and the estimate was close. 10,059 dominos were actually used. Can you spot the 2 hidden references to ? Extras and full fall down in real time can be seen here: This music in this video is by Joseph Stern: The world record for a domino spiral is 28,800 (450m) by mmcodomino: