system
Given the following post, respond as if you're commenting on Reddit:
human
[Back to the Future] How did Marty and Doc meet?

How does a 17 year old become best friends with a disgraced nuclear scientist?
gpt
I seem to remember reading somewhere that Marty was told when younger that Doc was someone to avoid, and of course being a rebellious adolescent, he approached Doc anyway, being taken on as his part-time assistant, and grew a friendship as time went on.