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Answer: They are disguised because they are committing a crime by falsely claiming the reward.

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Answer: Due to strict child safety laws, a minor would never be allowed to climb and hang off from a bridge. A stunt double did the climbing. Close-up shots would be filmed on a sound stage with specially built props, and a safety harness, or other equipment used to make it appear as if Annie was "hanging" from the bridge.

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Answer: Mrs Hannagan said to Mrs Farrel that Annie has it coming to her for trying to run away all the time. She is supposed to be punished etc., not spend a week in the lap of luxury. So she's trying to keep Annie there. But later in the movie, after Hannigan saves Annie's life, it is implied that she actually does care for Annie more than she lets on. So maybe Annie was actually her favorite orphan and she really just wanted her to not leave. After all Annie spends time comforting Molly and the others, when it's supposed to be Mrs Hannigan's job, but she's too busy drinking. She probably actually liked having Annie around but would never admit it or show kindness outright. Until the end, when finally she did.

Answer: Hannigan was plotting with her con-artist brother for him and his girlfriend to pose as Annie's long-lost mother and father. The couple would claim Annie to collect the $50,000 reward that Warbucks was offering to find Annie's real parents.

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