The moment in question came near the end of the third quarter. With the Lions trailing by five points, kicker Michael Badgley came out to attempt a 29-yard field goal. Badgley had not missed a field goal or point-after attempt all season, and it was Nantz's job to inform viewers of that fact.
Knowing, however, that he would be blamed if Badgley missed the kick, Nantz prefaced the moment by saying, "Do not talk to me about an announcer's jinx." You already know what happened next.