Teddy Bridgewater acknowledged he "failed" the Denver Broncos when he "didn't give everything" on Darius Slay's 83-yard fumble return for a Philadelphia Eagles touchdown.
The Broncos headed into Week 10 on a high after a win at the Dallas Cowboys in which quarterback Bridgewater threw for 249 yards and a touchdown.
But that momentum was sapped by a defeat to another NFC East team on Sunday, with Denver coming up well short in a 30-13 defeat.
Bridgewater struggled to get the ball moving back at home, averaging 6.28 yards per attempt. He has advanced 6.4 yards per attempt in losses this year, versus 8.65 yards per attempt in wins.
But it was what Bridgewater did without the ball that attracted the most attention, as the former Carolina Panthers QB was widely criticised for his role in Slay's score at the end of the third quarter.
Davion Taylor knocked the ball free as Melvin Gordon attempted to get to ground on fourth and one, with Slay recovering the fumble and then running right by Bridgewater, who made no attempt to halt his opponent, en route to the endzone.
Bridgewater reflected on the episode on Monday and accepted he did not come out of it at all well.
"It definitely was [the toughest film session to sit through], especially when you slow it down," he said.
"In real time, it's like everything's happening fast, you've got the sideline to your advantage... and then when you slow it down with the clicker in your hand, it's like man, this is bad.
"Hopefully I never have to be put in that situation again, and if I am, make sure that I lay it all on the line.
"If I am, I'm going to make sure I lay it all on the line. I won't be the talk of social media or the internet or whatever. Hopefully we can just but this behind [us] and move forward."
Bridgewater added: "I'm right there, the opportunity to just dive, sacrifice, do whatever I can to help the team in that moment.
"I failed. And I owned up to it. It's unacceptable as a football player, as a member of this team.
"We play this game, and you lay it all on the line every week, and that's one of those moments where I've just got to accept the fact that I didn't give everything I had in me on that play.
"I understand, man; there's going to be some backlash that comes with it. I'm a grown man. I'm a professional athlete. I understand that's what comes with it – backlash and things like that.
"It doesn't define who we are as a football team, it doesn't define me as a man and as a football player."