When I don't move for a while, the lights go off. So to turn them back on I wave my arms around. This happens every 10 minutes or so because it's just me and a couple of petrified fossils working here.
So when my parents had some friends over I was sitting on the couch just talking about what those damn grown ups always talk about when i'm around: "How's work, do you make enough money? how's your lovelife, find true love yet? Saw the soccer game yesterday?".. I noticed the room getting darker. Not realizing it was just the sun hiding behind the clouds, I just shamelessly waved my arms around to turn the lights back on. ^,^