You know how you can set up dominoes and make them fall over in a big line?
That’s what a couple groups of people did, but they decided to use some unique materials.
One group set up a couple hundred library books like dominoes to be knocked over, another group did one in a grocery store with boxes and cartons and packets of food!
My favorite were the human dominoes. Maybe a thousand people stood in a giant line, and each one was holding up a bed mattress behind their back.
The person and mattress in front of each one would knock down the next, and they were perfectly fine because they just landed on their own mattress!
Check out the weird dominoes video: