Help identifying TV show/movie with disabled kid and angry father [closed]

I don't know what spurred the curiosity about this, but a while back, maybe 10-15 years I saw a movie/show on TV (I feel like it was on Lifetime but I could be way off) where a disabled child and his father are in line at a grocery/convenience store. The kid was probably a mid-teenaged boy, and his disability was like a stutter; he didn't talk well. There was an incident in the store, where I think he was looking at someone but couldn't speak, and the person got perturbed by the child's stare and got angry and I think the dad got involved, hurt the man and then berated the kid. The kid was visibly shaken and felt really bad.

Super random, I'm sorry but for whatever reason the scene will randomly pop into my head and I'd love to remember what it was from.

I remember the dad saying something like "why do you always do this" and making the kid feel bad. Just got a really strong feeling of "dysfunctional" from the kid's family.