FEAR!!! Run with a primed grenade and as long as you hit the enemy and they aren't right in front of you you've got an awesome kill with lots of blood that doesn't hurt you. I like the remote nades in FEAR too, you stick them to walls, and then trigger them as the enemy walks by. The coolest thing about them though is if you manage to actually toss one ON your enemy (the head is the best), it will stick and then you trigger it and watch them go BOOM!!!