In MW3, Survival mode we encounter Sucide bombers and later Sucide dogs. I always thought these guys could have been a unique and interesting killstreak for MP. The Killstreak would've cost around 11 kills, for 1 minute you get AI Sucide Bombers running into the map. They're easy to Kill, but they blow up instantly upon death. They also do shoot at Kill enemy players. For 12 kills you could have Sucide attack dogs. 😅