So I'm thinking either:
A.) If an Autobot craps in the woods...
B.) "Aw, jeez, Bumblebee, where's the terlet paper, huh?"
(For the record, option B works better if you imagine it in an Archie Bunker voice.)
Cheap jokes, I know, but come on, look at it! These things write themselves. Also, is it possible to look at this picture and not think of the Optimus Prime colon cancer PSA on that episode of Robot Chicken? Check yer tailpipes!