I started making dinner when I got back from school and the gym.
Roommate: "Oh are you making dinner?"
Me: (obviously making dinner) "Uh, yeah."
Roommate: "Oh, okay, I'm just sautéing something."
Me: (mystified as there is nothing of hers frying on the stove)
Roommate: (nods to bowl of meat defrosting in water on the counter)
Me: (stiffling laughter as she walks away)

This is almost as priceless as the time she lectured us about what a great cook she was and then asked what "el dente" meant.