"This one's eating my popcorn!"

The full joke goes something like this:

One day, a man is strolling through an open-air market place. He stops at one of the live animal stalls and buys a chicken thinking that he will take it home, wring its neck, clean it and make a nice chicken stew for dinner. On his way home he passes a theater that is showing a movie that he has been wanting to see and he decides to go in. But when the woman at the box office sees the chicken she tells him, "Sir, animals are not allowed in the theater. You'll have to come back some other time." Well, now, this guy really wants to see the movie (it's probably something starring Tommy Lee Jones) so he goes around the corner, stuffs the chicken down his pants then returns to the theater and buys his ticket. After he has taken a seat and the movie starts, the chicken starts to get restless, so the man unzips his pants to let the chicken get some air. The woman sitting next to him leans over to her husband and whispers, "Honey, the man next to me has his pants open!" Her husband tells her, "Just ignore him!" "But Honey! His thing is sticking out!" Again her husband says, "Ignore it! You've seen one before!" "But Honey!," she finally says, "This one's eating my popcorn!"