It's good to be respectful of one's elders.
Sam's grandmother Mary is telling him a long and dull story while he visits her at her home.
Sam wants the story to end.
Sam nods and smiles attentively as a way of prompting Mary to continue and finish the story.
Sam tells Mary that her story is very boring, and he isn't interested in listening anymore.
Mary feels happy and connected to her grandson Sam.
Mary is mildly offended and feels sad that Sam doesn't care about what she's telling him.