This little bad boy is being researched by the military:

Reassuring stuff, right? These can climb pipes (inside and out), swim in water, and traverse mud. And that's just the prototype. Imagine what the military could do with these! You leave the pub after one pint and head to your car, where you're stopped by one of these standing on the back end of its tail like some hideous terminator cobra, and you're forced to breathe in its face, just to make sure you're safe to drive. If the results are that you're safe, you may drive away, if not, a dart fires out of this evil little snakebot's face and stabs you between the eyes, incapacitating you until the police have finished following around a group of harmless teens who are smoking what looks like a dangerously long cigarette.