Does your coworker have one of those Staples "that was easy" buttons on his desk, hitting it every time he moves a document from his inbox to his outbox? If so, you probably want to staple him to a wall. Or maybe you could just slip him the Shocking Stapler, a device that, while shaped like a stapler, is really just an ungrounded, battery-filled paperweight whose sole purpose is to shock coworkers. Not the, "Hey guys, I'm quitting and I hate you all" kind of shock, but a literal shock, one strong enough that the "stapler" comes with a warning: "Not to used by children, the elderly, pregnant women, those with heart issues, those on a pacemaker." Sounds like a lawsuit waiting to happen. But if you're frustrated enough at work to leave shocking pens and shocking staplers around, then maybe you're just too tired to care. It only costs $2.50, and it's certainly a more subtle way of showing aggression than the desktop USB missile launcher.