who’s chasing you with a clearly non lethal weapon is

The weapon in question is a metal blade on a stick.

It is readily capable of destroying an eye. (Aka: “Grievous bodily harm”) It is readily capable of severing the carotid artery. (Aka: “death”) It is capable of causing a wide variety of similar permanently debilitating, disfiguring, or lethal injuries to the officer in a very short period of time.

The video shows that the kid was attempting to strike a retreating officer in the head or upper body. Any person in the officer’s position would reasonably fear a significant possibility of death or grievous bodily harm from this attack.

I therefore reject your assertion that the weapon being employed against the officer can be reasonably described as “clearly non lethal”.