Wired:

You’ve seen the video. Everyone on the internet has. A man sits in a cubicle and pounds his keyboard in frustration. A few seconds later, the Angry Man picks up the keyboard and swings it like a baseball bat at his screen—it’s an old PC from the ’90s, with a big CRT monitor—whacking it off the desk. A frightened coworker’s head pops up over the cubicle wall, just in time to watch the Angry Man get up and kick the monitor across the floor. Cut to black.

Most of us have seen and laughed at this grainy video but I had no idea it was staged.