When I was a kid I didn't move my arms when walking. I thought was more evolved then other humans - they swung their arms like monkeys in trees. Here is an episode from Seinfeld about a woman who didn't swing her arms when walking.
Quote:
Seinfeld Episode #822 -- "The Summer Of George"
[A woman comes walking by, with her hands hanging still besides her.]
Elaine: Who's that?
Dugan: That's Sam, the new girl in the counting.
Walter: What's with her arms? They just hang like salamis.
Dugan: She walks like orangutan.
Elaine: Better call the zoo.
Dugan: Reer...
Elaine: What?
Walter: ssssss...
Dugan: Cat-ty...
[Jerry's apartment. Jerry and Elaine. George is watching TV.]
Elaine: It's like she's carrying invisible suitcases.
Jerry: Like this? [imitates the walk]
Elaine: Yes, exactly.
Jerry: That's so strange.
[Later in the show in Elaine's office. She is at her desk talking to Sam.]
Elaine: Sam, listen I'm so sorry about the other day.
Sam: No, don't apologize Elaine. I was thinking that maybe I should swing my arms a little bit more.
Elaine: See, yeah, that's all I was saying.
Sam: How's this [Sam hits a pen case out of the table], or this [swings a paper holder of the table and starts to clear the table left and right].
Elaine: Well, you seem to be getting a hang of it...