Completely Unnecessary

BU1: ...holds a bottle of water, shakes it in front of my face, and walks off... I'm about to do something that's going to piss you off.

EA2: ...following him down the hall...  What?

BU1: I'm going to run more water through the old grounds in the coffee pot.

EA2: You're a miser!

BU1: laughs as he fills the reservoir with water

I mean really, of all the things not to waste. He's playing recklessly with my quality of life.