We've all seen the infamous completely improvised scene from 40 Year Old Virgin, with Seth Rogen and Paul Rudd going totally from their heads with the stuff. Out of all the tributes on Youtube to this scene, I like this one the best. The angle of them sitting side by side isn't actually in that apt. They had to cut out the wall with the TV on it and pick up the shots showing them actually playing that game later, which is also inserted video game footage.
Anyway, without further adieu...
I know, I'm damned awesome for finding this. Hold your applause ladies and gentleman, just doing ma jobbie.