The alien's spaceship was having a rough landing, so it went to the local watering hole to get a drink and forget its troubles. The bartender, a wise and witty human named Bob, asked the alien what it was having.
- The alien said, "I'll have the usual, Bob. The 'Galactic Gimlet' and a side of 'Rocket Fuel'."
- Bob replied, "Coming right up, space traveler! But you know we don't serve 'Rocket Fuel' here, that's just a myth spread by rival bars on the moon."
- The alien said, "Fine, just give me a glass of 'Martian Mule' then, but make sure it's extra spicy."
Bob poured the drink with a flourish and said, "There you go, enjoy! But don't tell anyone I'm serving 'Martian Mule' again, I don't want to lose my license to serve intergalactic patrons."
Meet the Barkeep: Bob More Puns for the prophets