Watching the video carefully you see his tow go over the top of it, presumably he was trying to battle that LAV and may well have had shots in the air, or not had time to react to you blowing it up.
I bet had you not walked toward the blown up LAV this wouldn't have happened.
I think this was...
So you think we should let people glitch inside of the map and shoot people from where they cannot be killed?
We only go after glitches that give a definite advantage, and in cases where people clearly are doing it with ill intent.
Ref: https://banzore.com/forums/threads/complaint-from-krispynutz-about-player-juicycatslop.19151/
He landed back, presumably to see if you'd get out and/or ask you to, and within 5s you jumped out and TKd him.
There was nothing wrong done on his part.