These two hunters went moose hunting every year without success. Finally, they came up with a foolproof plan. They got themselves a very authentic moose costume and learned the mating call of a moose. The plan was to hide in the costume, lure in the bull, then come out of the costume and shoot the bull.
So, they set themselves up on the edge of a clearing, in their costume, and began to give the moose 'love call'. Soon, their call was answered by bull in the forest.
Again they called, and the bull answered came crashing out of the woods and steamed toward the hunters. As the bull's pounding hoof beats got closer, the man in front said, "OK, lets get out and get him!"
After a moment that seemed like an eternity, the guy in the back shouts, "The zipper is stuck! What are we going to do!?"
The guy in the front says, "Well, I'm going to start nibbling grass, but you better brace yourself!"