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: Mr. Dinkleman's straps appear and disappear randomly throughout the movie. Although they are adjustable and we see Boog lengthening them on his first day in the woods, there are several scenes (even before Mr. Dinkleman is damaged after the flood) where the straps just disappear.
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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