Running into someone in a non-dance context through a mutual contact in the hip-hop dance community, without expecting to know or be acquainted with someone from said background.
"I ran into another street dancer at this event today and guess what, they know XYZ too!"
"Really!? That's such a Rawkus Effect again!"
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.