A priest and a rabbi operated a church and a synagogue across the street from each other. Since their schedules intertwined, they decided to combine their finances and buy a car together. They drove it home and parked it in the street between their establishments.
A few minutes later, the rabbi looked out and saw the priest sprinkling water on their new car. It didn't need a wash, so he ran out and asked the priest what he was doing. "I'm blessing it," the priest replied.
The rabbi replied "Oh," then he ran back into the synagogue. He reappeared a few minutes later with a hack saw, ran to the car and cut off the last 2 inches of the tail pipe.