What’s up?

A man in a red shirt lies on a couch, talking on a cordless phone with a relaxed expression, while another man in a red shirt stands in the background with arms raised; the scene cuts to a figure in a white ghost mask holding a knife in a dark room, then to a bald man with glasses and a beard standing before a brick wall, who reacts with a wide-eyed, open-mouthed expression as the lighting shifts to green.