Thursday night's Chargers-Chiefs game featured an extremely scary moment involving tight end Donald Parham.
In the first quarter, Justin Herbert found Parham in the back of the end zone on a fourth down. Parham went down hard and appeared to hit his head against the turf. He went into an awkward, stiff-looking position on the ground, and ultimately had to be taken off the field on a stretcher.
It was a frightening scene, though Sunday Night Football medicine analyst Mike Ryan, a former NFL head trainer, explained what likely happened with Parham. He believes Parham's body underwent what is called a “fencing response” to a head injury.