If this was in a movie I could see the scene now.
Brainy killing Machine: I will end you for I am faster and smarter then you.
(Hero aims gun)
Brainy killing Machine: (Ha Ha Ha) I am bullet proof.
Hero: That's why I got armor piercing rounds.
(Hero smirks and fires. The bullet hits one of the brain domes and water starts coming out of the hole. The machine sees this and yells in rage.)
Hero: Ya ain't that smart now.
(The hero darts off into the woods and the machine follows after.)
Could be fun.