The name of the performer escapes me, but he does all sorts of demo shit. And you can tell that he's got the chops, so demoing a cheap self working trick is a downgrade in a humiliating kind of way.
Take a look at the following video. Skip to the very end, and you see what happens after the demo. You can see his fake smile fading and his true disgust comes through. You can actually see the moment his heart breaks as he realizes what sad, sad thing he's done.