Answer: I think after the flood from the dam happened, Boog lost his teddy bear. When he went to retrieve it from Shaw's house, he was soon driven to the cellar by Shaw. Shaw was also singing the lullaby because he had the bear. He must have found it, kept it, and listened to the song enough times that he memorised it.
Open Season (2006)
2 questions
Directed by: Anthony Stacchi, Jill Culton, Roger Allers
Starring: Martin Lawrence, Ashton Kutcher, Gary Sinise, Debra Messing
Continuity mistake: When Boog is "attacking" Elliot backstage at the Amphitheater and is pulling the ropes which the audience thinks are his intestines, the ropes are pulled willy-nilly and at great lengths when viewed through the curtain. But when viewed backstage while Boog is trying to tie Elliott with the rope, the rope is coiled neatly in a pile, except for a short length in Boog's paws.
Reilly: Yo, O'Toole.
O'Toole: Yeah, boss?
Reilly: I want you to cantilever that cedar on a bias by the north side.
O'Toole: Huh?
Reilly: Put a twig in the hole.
O'Toole: Oh.
Reilly: Rookie.
More trivia for Open Season
Chosen answer: Shaw named his shotgun "Lorraine". He refers to the gun by the name throughout the movie. It's not an uncommon practice among hunters.
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