Carry a Laser down the road I must travel

The story:

This goof has already been listed but...When I was a graduate student I had a housemate who had formerly been a Catholic priest. We occasionally went on roadtrips together and when I sang that phrase along with the radio,Patrick began laughing so hard, he drove off the road and we mowed down about 50 yards of wheat. What it worse is that I had been an altar boy as a youngster and had not recognized what I had sung during Mass every Sunday for several years.