Seems to me I've seen a television commercial (for Target?) with the same idea performed on checkout conveyor belts. No clue if it's the same guys or not.
Probably the same place where forty sunthin' people type "Freakin' Awesome".Where do people come up with stuff like this.
That's ingenius, genius. :sign: (JK, JK, JK...I just couldn't resist the word play)
...or did you mean igneous rock? (okay...that was just sad)