ARIZONA Cardinals coach Jonathan Gannon clashed with running back Emari Demercado after a calamitous Week 5 error.
The shocking incident occurred late in the Cardinals 22-21 loss to the Tennessee Titans on Sunday.
Demercado looked to have broken free for a 72-yard touchdown early in the fourth quarter at State Farm Stadium.
The score would have put the Cardinals up 28-6 after a dominant performance.
But Demercado celebrated too early, fumbling the ball on the one-yard line and into the endzone for a touchback.
The error would lead to a rejuvenated Titans storming back, hitting 16 unanswered points to steal their first win of the season.
In footage circulated on social media, Gannon is seen engaging in a heated discussion with his running back on the sideline.
The coach roared in