There are some great documentaries that do a really good job in communicating what stutters go through, how they feel, how it impacts them, and also a bit about the causes of stuttering. I've always found it hard to articulate to others what living as a stutterer feels like, so it's good that I can show somebody who's interested a documentary that captures it. Two that I can recommend are [When I Stutter](https://vimeo.com/ondemand/whenistutter) and [ STUTTERING - My Constant Companion](https://vimeo.com/ondemand/stutteringfilm/334370830). The first is completely in English, the second is in German but has English subtitles. PS.: If somebody knows other documentaries, I'm looking for more, so feel free to share.