I know the man is wasting gas, but how is the woman a waster?

Question

http://youtube.com/watch?v=4tfFI4uBaH0

Answer 1

leaving the tap running

Answer 2

She leaves the water running (full blast too!) and the fridge door open (I know she is looking for eggs, but she turns around and talks to the guy, still holding it open...), which wastes a lot of power and places stress on the fridge to keep the temperature constant.