"If someone did you a
favor- something big,
something you couldn't do on your own
and instead of paying it back, you paid it forward to three people...
And the next day, they each paid it foward to three more...
And the day after that, those 27
people each paid it forward to another three...
And each day, everyone in turn paid it forward to three more people...
...in two weeks that comes to 4,782,969 people."
-Trevor