Make a wish
Two men were adrift in a life boat following a dramatic escape from a burning freight vessel. While rummaging through the boat's provisions, one of the two men stumbled across an old lamp. Secretly hoping that a Genie would appear, he rubbed the lamp vigorously.
To the amazement of the Castaways, one did come forth! This particular Genie, however, stated that she could only deliver one wish, not the standard three. Without giving much thought to the matter the man blurted out, "Turn the entire ocean into beer!"
Immediately the Genie clapped her hands with a deafening crash, and the entire sea turned to the finest brew ever sampled by mortals. Simultaneously, the Genie vanished to her freedom. Only the gentle lapping of beer on the hull broke the sudden stillness as the two men considered their circumstances.
The other man looked disgustedly at the one who's wish had been granted. After a long, tension-filled moment, he spoke: "Nice going! Now we're going to have to pee in the boat!