The brothers obviously had a lot of fun with the situation, joking with each other and sometimes acting like a comedy team.
Someone asked them to list their commonalities and philosophical differences.
"I would be hard-pressed to spell philosophical right now," Jim said.
"I know he can't spell commonalities," John said, not missing a beat.
Although Jack Harbaugh has received much of the credit for molding the boys into coaches, the brothers revealed that their mother, Jackie, also had a great deal of influence on their growth into men.
"There is no one in the family who has more competitive fire than my mother. She competes like a maniac. She has just always believed in us, and I think that is the most important thing to me. She believed in me, John, and Joanie, and took us to games and played catch with us, shot baskets with us, and just believed in us."
"No one would fight harder for us than our mom, no matter what the situation was, or teach us how to have each other's back and be there for one another," John said. "We may have been talking football with dad in the basement, but mom was talking about other things. There were a lot of things going on in our world during the '70s, and Mom was always tuned in on those kinds of things."
Someone asked the brothers whether they considered how they will handle the postgame handshake. Jim Harbaugh enraged Detroit Lions coach Jim Schwartz for giving him a quick handshake and a hard backslap after a 2011 game, but that certainly won't be an issue Sunday night.
"I've given absolutely no consideration to the postgame hand shake or bear hug or anything else," John said. "I haven't thought about that for one second. Have you, Jim?"
"I have not," Jim confirmed.