When there is traffic on roadways, but it involves large masses of people standing with their hands up or laying in the street mimicking a crime scene.
Emily: "Why were you late to school today Becky?"
Becky: "Oh I was stuck in Ferguson traffic. A guy stood in front of my car with his hands up for 10 minutes."
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.