I have sort of a situation specific question here, Last night I was in a warthog as the gunner myself and an enemy hogs gunner both attacked and killed the others driver. After we were both thrown from our hogs I saw he was going to drive off and I stuck his hog with a plasma as he began driving killing him in the process. Right after I got in my hog and proceed to the next nav. Not sure if me killing him in that situation was against the rules so I figured I'd ask for future reference.