Domino Day is a world record attempt for the highest number of falling domino stones, organized each year by Robin Paul Weijers, also known as Mr. Domino.
A new world record was set on 17 November on Domino Day 2006. 4,079,381 stones were toppled out of the 4,400,000 that were set up. Four builders’ challenges were set in which pairs of builders were chosen to complete vital parts of the set-up while the dominoes were already toppling. The first three builders’ challenges failed so the success of the last challenge was crucial to setting the world record.
The design of the course took about a year and a team of 90 builders took around two months to build it. It then took over 2 hours to tumble. Here are about 20 minutes of the whole thing.