A father and his young son are having a pleasant conversation, sharing stories and discussing what movie they would both most enjoy watching as they pull into the movie theater's parking lot. However as they get out of the car and start towards the theater a man walks up to the father and starts talking with him, despite the father having never met the stranger before. Eventually the stranger offers the father some cash, which the father accepts. The stranger then tells the son to come with him. Father and son speak briefly and share goodbyes before the son follows the stranger.
The father and son will never speak or interact with each other after this day. However, neither are saddened by this, or even consider the event particularly memorable. Why are these too not upset?
To avoid being too broad nothing unusual or spectacular happened after this to prevent their meeting.