An off-duty police officer, familiar with radar guns, drove through a school zone within the legal speed limit when the flash of a camera went off, taking a picture of his license plate.
The officer, thinking the radar was in error, drove by again; even more slowly.
He did it again for a third time, at an even slower speed.
"This guy must have screwed up the settings," the off-duty officer thought.
A few weeks later, when he received the violations in the mail, he discovered three traffic tickets: Each for not wearing a seat belt!