Well, this play turned out to be a complete disaster for the Chicago Bears. After Mitchell Trubisky completed a pass to Anthony Miller, the wideout coughed up the football, sending a multitude of bodies to the floor. Meanwhile, the referees failed to notice Mitchell Trubisky getting lit up by Lions safety Tavon Wilson with an illegal helmet to helmet hit.
The referees eventually overturned the fumble on the play, ruling it to be an incomplete pass. Still, Wilson wasn't flagged for his egregious hit on the defenseless Trubisky.
These are the precise hits the NFL is seeking to eliminate, but in this instance the referees failed to notice the dangerous hit.