Wow...incredible. And to think I was happy with a single straight line of maybe 50 dominos.
Thanks for posting.
How in the world did they prevent accidental triggering of the whole thing? There must have been a lot of safety devices installed during construction to contain false triggers.
Clever and carefully done
Looks like they worked from the inside out. To prevent accidents they probably pre measured short sections with no dominoes then would put them in last.