In 1984 I attended a rules clinic in Europe which was put on by Frosty Francis of IAABO. He told this story:
At the opening toss the referee tosses the ball about 40 feet into the air. Once the ball came down he re-tossed and the game continued.
At halftime, the umpire asked the referee what happened? "Well, just as I looked down to get my whistle I noticed that my pants were unzipped. So I tossed it high and while 10,000 people watched the ball I zipped up my pants."
And, this was before spandex