In 'A Christmas Story', the main character can't put his arms down because he is wearing a very thick and bulky snowsuit. The snowsuit is so puffy that it restricts his arm movement, which leads to that comical situation.
The character in 'A Christmas Story' can't put his arms down because of the snowsuit. This is a great example of how sometimes practical items like warm winter clothing can have unexpected and humorous consequences. The snowsuit was likely designed to be extremely warm for the cold winter, but the designers made it so thick that it became a hindrance to the boy's normal movement. It adds a lot of humor to the story and is a memorable part of the movie's charm.
Well, in the story, the snowsuit he has on is made in a way that it's really stuffed. It's a common thing in those old - fashioned, super - insulated snowsuits. His mother probably thought it would keep him really warm, but it ended up making it impossible for him to put his arms down. It's one of those classic, funny moments in the movie that really shows the kind of awkward and endearing situations kids can get into during winter.