I'd say it is those matches where you drop as a 4 man group and completely just dominate the other team through good communication and planning. There are lots of times when this happens and you get a good rush out of it. Below is just one instance of us running a four man that rolled up just about all the competition- I guess that Jagermech in there stole one of our kills:

My fellow Echo Company pilot, and myself accounted for ten kills on the other team. I was running 2x PPC and 2x AC/5 in my Battlemaster, while Corewatch was running his ever stalwart 2x Gauss, 4x Medium Laser Cataphract. I think for such a small map these numbers were pretty good considering the limited lines of fire you can achieve. Frozen City definitely doesn't tend to be a sniper map.