system
A chat on subreddit /r/me_irl
human
Wasn’t it if the cashiers tried to up sell him (larger meal/extra item) he had to say yes?
gpt
Yes this was the rule. Whatever he got he ALWAYS had to get a meal with it, and if the cashier asked if he wanted the super size option (which is no longer available, in large part because of this doc) he had to say yes. 

In the doc they also show a relatively healthy dude who eats Big Macs daily, so it is possible to regularly eat Mcdoanlds without killing your self. The guy was just intentionally going overboard to show what it can do