Minecraft, the real-life version of the game's Creeper is far less terrifying. He won't, for instance, murder you in a clandestine mine.
Combining a "cheap RC car," a PIR sensor, several cardboard boxes, and a melange of other electronic bits (not to mention a good amount of ingenuity), Chris' Creeper not only defends his house, but also terrorizes his neighbors. As seen above, Chris likes to place the Creeper in very appropriate locations. Head past the break to see a video of the monster in action.