Just once. In the Rusted Lands on control. Game started and I was the only one on my team to run towards B. As I'm coming up on it I get one guy coming over the wall with Hawkmoon. The next two come towards me from under the wall and I get them with a grenade and melee. I pull out my shotgun and get the final three in a row as they're jumping over the wall. It was definitely my best game ever. I had 17 kills before my first death, and went 33 kills 5 deaths.