Buffalo Bills center Eric Wood's helmet had been ripped off and a couple of punches delivered into his face.
A full-scale brawl erupted, and in the mass of bodies, Wood screamed he would murder the rookie who did it.
Toward the end of this morning's practice at St. John Fisher College, undrafted rookie defensive end Bryan Johnson locked up with Wood after a goal-line drill.
Running back Fred Jackson had slithered into the end zone. The play was over, but the battle was not.
Before the fight could be broken up, tight end Scott Chandler had taken Johnson to the ground. Chandler's helmet also was torn off. An incensed Wood marched toward Johnson and yelled, "I'll f------ kill you!"
Johnson, a roster long shot from West Texas A&M, stalked away without his helmet.
"Twenty-one days in pads and counting!" Bills defensive end Jerry Hughes bellowed with glee. "I love it! That's what happens, baby!"
Bills coach Doug Marrone wasn't amused.
"It's not part of the game," Marrone told reporters afterward. "Therefore, I don't want to speak about it. It hurts the integrity of our game the more we talk about it. That's how I feel about fighting."