And depending on your audience or how often you (don't) go back and review it, it can help to comment the things that are self explanatory.

I write a lot of scripts for my team and have to make them "maintainable" by the people in my department (who are as familiar with the concept, as your buddy that calls the gym the James), so I will regularly over comment so that any ape can come along and hopefully know what the script does.