Sorry for posting here, as oreo's forum account is not yet approved, so on behalf of him.
seems not his mistake the level of the ground and the fence is little imbalanced here, he just jumped at the car which disappeared in a while and the animation of falling down changed to unintentional evade as the fence is little lower than the anti-fall level.
tip: watch the video in slow mode the animation of him dropping wasn't same as jumping, its falling animation there.
proof i can provide with my statement is