That minuscule fraction of time it takes your brain to realize that you've just made a GIGANTIC mistake and reconcile the fact that it is too late.
Bob hit send on his email to Tom, only then realizing that he had copied in the entire company on the x-rated pictures of him and his latest conquest swinging from his sex swing in full leather outfits.
When you have to pee in a movie but don’t want to miss anything, and must do the following mental equation: will the amount I have to pee cause enough discomfort to diminish my attention capacity for the remainder of the movie to an extent which is greater than the amount of the movie I would miss by making a mad dash to the restroom.
I saw Satantango last night, wonderful film but by the 5th hour I had to start doing pee calculus.