There's a great trailer for this that shows the two main characters slowly strolling along the waterfront. An elderly lady is standing looking over the edge down at the water (feeding birds maybe)... Steve Martin casually places his hand on her back and pushes her in.
I almost stopped breathing from laughing too hard when I saw that in the cinema. The scene's not in the film though.
Great film, just a pity there'll probably be zero extras. I'd pre-order if there were going to be extras, but as there no doubt won't be, I'll pick it up on the cheap later.