The National Guard would have to go get Favre out, because he would never leave. As much as I dislike him, Favre has heart.
Favre plays by the old Vince Lombardi motto: "If you can stand, you can walk. If you can walk, you can run. If you can run, you can play."
Favre once played after yakkin' up blood on the sidelines. I've been watching him his whole career. There is no way in heck he'd be standing on the sidelines of a playoff game, watching someone else QB his team.