I had a pastor friend who went into the pulpit one Sabbath morning wearing a pair of new bifocals. The reading portion of the glasses improved his vision considerably, but the top portion of the glasses didn't work so well. In fact he was experiencing dizziness every time he looked through them.

He explained to the congregation that the new glasses were causing problems, "I hope you will excuse my continually removing my glasses," he said. "You see when I look down I can see fine, but when I look at you, it makes me sick."