For a first deviation, I can hardly imagine anything finer! Your expressions here are not merely superb and gut-wrenchingly funny, but truly inspiring. If I didn't already know that I am probably the worst actor on the planet, the sheer entertainment that this image is would convince me to go find a play or something to take part in right now.
I say, the pose that you guys were able to hold for this image is probably one of the more difficult that I could imagine, and you managed to pull it off magnificently! It accentuates your expressions in a way that escapes mere words but will find the universal soft spot for humour.
However, the one thing that I do not particularly like is the vignetting, as it, for me, detracts from the mood of the piece, turning something that should be humourous into something that seems more nostalgic, while humour is the true atmosphere that I see in this image!
All in all... I think that you guys did an awesome job here, and I cannot begin to comprehend how you must perform in a film, with more than one frame, and audio to act your scene!