I don't believe in using too much graphic violence, although I've done it. It's better to be suggestive and to allow the viewer to fill in the blanks in their minds. ↗
What I learned about stammering was that, when as a young child you lose the confidence of anyone who wants to listen to you, you lose confidence in your voice and the right to speech. And a lot of the therapy was saying, 'You have a right to be heard.' ↗