This looks very suspicious.
During the 2nd half game against the Kansas City Chiefs in the AFC Title game, the Tennessee Titans were trying to convert a 3rd-and-1, but a holding penalty stopped those efforts rather quickly.
A fan went back and looked at it and it shows the ref with his hand on his flag and tossing it as soon as the ball was hiked. The Titans player he threw it on wasn’t even engaged with anybody before he threw that flag.