HP cutting cake with one expensive knife!!

Recently there have been numerous publicity stunts and events defying MacBook Air's slimness but this one's a little different cause HP's exec is doing that publicity stunt !! Is he trying to prove that MacBook Air is the sooo thin that it can cut through anything or is he just trying to prove that MacBook Air is nothing but an expensive knife.
I think that depends on each individual. I think you got mine.
Here's the image:-
http://www.rahulsood.com/2008/05/ugh-it-was-my-birthday.html