When I decided to watch Keep the Change my idea of what it would be about was pretty wrong. I had no idea it was about people on the spectrum. It was during the first scene of the support group that I started to understand that it was, especially when it zeroed in on Sarah. It took a while longer to realize that David too was on the spectrum; the character's desire to make people think he was just an average guy with "allergies" worked... for a while. And this was a big part of the film: David's coming to terms with who he was. In contrast, the character of Sarah was just so confident and comfortable within herself, she was a joy to watch. She's spontaneous, expressive and creative the way a child is. She also has the innocence of a child which is all the more striking as part of her acceptance of who she is includes sexuality! I believe it's the character of Sarah that gives the film its feeling of joy, which, in fact, David can't help but get swept up in himself. I just love how Sarah is so strong while being so innocent and childlike. Even in the end, she performs a heroic gesture, which was ultimately both moving and gratifying for me.