A domino can knock over a domino 1.5x larger than itself, so 13 dominoes can amplify an initial push 2 billion times.
Adam Rifkin stashed this in Best Videos
'If I had 29 dominoes, the last domino would be as tall as the empire state building.' Well this is the one we all want to see happen! Can someone do a kickstarter thingy for these guys? Surely there must be a bored billionaire out there who cares more for grand-scale whimsy than philanthropy?!
How could one even build a domino of that size?