Amazing, but not unbelievable. There's no reason to believe that even the most down home cornpone, fart-joke-telling, old-lady-mooning yeehaw knows when enough is enough.
Go back to Green Bay, Brett. They won't be mad.
The last NFL pass he ever threw was a game-blowing interception. That's gotta sting. So he's got to have one more chance. To gunsling. To have fun out there. To make Joe Theismann's career-ending injury look like a sprain.