First I would no clip through the couch and appear sitting next to them, just as they are saying W T Eff, I would proceed to use my invisibility watch then disguise myself as one of my other friends and re appear standing next to them. Once they notice one is a fake I would proceed to throw a plate of nachos on the table, no clip out of the room then walk back in as if I was never there and say "Oooh Nacho's!" eat them and watch some television.