First, the prank:

I found this on the YouTube home page, and I assumed that it was a featured video. Upon closer inspection, I realized that the vid was placed where ads normally sit. In other words, this is actually a paid advertisement for OfficeMax.

This is extremely clever, and I watched the entire 1:17 vid waiting to see what happened. Now, while I think this is cool, I can imagine that OfficeMax will get plenty of people who want to pay with pennies.