I'm not sure where this video was taken or if it's real or not [it appears to be] but you have to check it out.
A guy in an open office environment flicks paperclips at his coworker, who then goes crazy and attacks him. He crawls over the entire desk, throwing off anything he can find to get to the guy across from him. The funny thing is while the guy is being tackled, he stays on the phone. I'd be interested to know if you've ever had anything like this happen to you at work. It seems workplace violence is not as uncommon as one would like to think.