I really like this one
MAIM! BASH! BLUDGEON! CRUSH! This military death-droid doesn't take any shit. Got a problem? Violence is the solution. Parking ticket? Kill them. Post's late? Bear trap. Cold pizza? Tactical warhead. You're not sure if people respect or simply fear you, but if they get in your way, they're toast.
What's your malfunction?
Are You Coming To My Birthday Party Now?!