Ninten-dominoes! And a brief mention of Sonic the Hedgehog!
Domino Count: 30,000
Human mattress dominoes? Human mattress dominoes.
Domino Count: 850
277,275 dominoes were set up in an attempt to grab the Guinness World Record. 272,297 were toppled. Holy crap.
Domino Count: 277,275
This may not look that impressive at first - but Stephen Morris is demonstrating something insanely cool: a domino can knock over another domino that's 1.5x its size. Starting with a domino that's about 5 millimeters high, you could knock over a domino the size of the Empire State Building (given the ability to make dominoes that big).
Domino Count: 13
In the Cora supermarket in Rennes, France, the employees decided to have some fun with dominoes - without using dominoes.
Domino Count: 0 (but a whole bunch of other things)