What are other examples of the trope “don’t worry about blind/deaf/crazy person, they don’t react to anything” who then obviously reacts to protagonist?

Recently watched the new Running Man movie (meh) and it had one of my most hated tropes of all time, ”oh my mother is deaf and isn’t mentally well so you’re safe” who then recognizes the protagonist 3 minutes later and tries to call the cops (they subverted it slightly).

I know I’ve seen this in films before but having trouble finding any.