There is a movie trailer out there for the Mel Gibson flick 'Apocalypto', for details check the IMDB site, but someone at work mentioned that you should play close attention to the trailer around the 1:45 mark. It is really hard to spot - but here is it for your viewing pleasure...
At 1:46 you see this frame ...
A couple of frames later, you see this frame
The funny frame is in the middle, Mel Gibbson having a good time ...
nice marketing ...