Bug or cheater?

hex_devour

This guy was on death's hook and i downed him and picked him up. For some reason it wouldn't let me hook him, until i noticed he wasn't physically on my shoulder. Instead he is stuck in the air but his wiggling still causes me to move left and right. I also wasn't able to use my M1 attack button so i was forced to watch everyone escape in the end game collapse, the guy up in the air died to it.

Is this a bug associated with picking up survivors or was this guy cheating?