Chatroulette is like a box of chocolates, you never know what penis you're gonna get.
But unsuspecting users got a genuine, non-penis, treat thanks to the creative people at Realm Pictures, who plunged people into a zombie-filled, immersive, real-life first person shooter that they could control with voice commands.
All people had to do was type 'start' to begin, then guide their character through the first level (mostly filmed in a very large garden), and avoid the hordes of undead extras.
You can also watch a behind-the-scenes making of video here, and one of the creators has confirmed that the team are hoping to make 'level 2' soon.
Watch the clip below: