OUT OF THIS WORLD FILL-UP
A flying saucer was low on fuel, so it landed near a local gas station out in the country.
On its side were the letters "U.F.O."
The gas station attendant was stunned, but his curiosity got the best of him.
"Does that there stand for Unidentified Flying Object?" he asked.
"No," one of the other scaly green alien travelers responded, "it stands for ...............
..............'Unleaded Fuel Only'."