Created by my math teacher Mr. Tomlinson, used to diss the students. Not to be mixed up with the one liner : who cares? This one has a pause until the other person responds.
Mr. T: Why weren't you here last week?
Vikki: My Grandma died, so I had to go.
Mr. T: Who?
Vikki: My Grandma
Mr. T: Cares!