Two U.S. astronauts make the first manned flight to Mars.
Upon landing and exiting their craft, they find themselves
face-to-face with a couple of little green Martians.
"How do we make contact?" asks the first astronaut.
"Gee, I dunno." Says the second. "Hey, I've got an idea! They
look pretty primitive. Let's impress 'em with some of our
advanced technology."
"Sure!." says the first. "After all, it worked with the Indians."
So he reaches into the pocket of his space-suit and pulls out
a shiny silver cigarette lighter. The Martians look interested.
"I think it's working-light it!" says the second. The astronaut
turns the wheel, and a flame shoots out. Immediately the
faces of the Martians turn from green to bright red.
"Wow!" says the first. "They must really be impressed."
Then one of the Martians reaches out his little green hand,
points a finger at the men, frowns, and says very sternly:
"Shabbos!"