[Ed: Reportedly told in the November '88 Playboy Party Joke Column]
Two hunters hire a small plane to take them to a remote area of Canada. Upon dropping off the hunters, the pilot tells them, "Remember only one moose, because the plane wouldn't be able to take off with more weight than that." The hunters go off. A week later when the plane returns to pick them up the two hunters are standing by the lake with two moose.
The pilot fumes, "I told you guys only one moose, you'll have to leave one because we won't be able to take off with that much weight." "Oh, c'mon," beg the two hunters, "Last year the pilot let us take two moose on, you're just a chicken."
Not wanting to be accused of being a coward, the pilot allows the two to bring both moose on the craft. The plane starts across the lake, straining to take off. The pilot tries and tries to no avail as they run out of room and the plane crashes into the trees at the end of the lake. A while later after coming to one of the hunters gets up and looks at all the scattered debris of the wreck and says, "Where are we?" To which the other hunter replies, "Oh, I'd say about a hundred yards farther than last year."