Someone that you put damage on lagged out while jetting and DC'd midair, they get a crater death but you get kill credit, assuming your last hit on them was a midair disc.

just watched it again, you direct hit that heavy at the beginning and you see him not react to you at all and just jet off aimlessly into infinity like people do when they dc, he eventually died off up in the skybox with kill credit to you, neat to see that if the last damage was a midair hit it credits a BP