I don't think this is a bankroll issue.
It looks like he wanted to have fun with $100, and didn't care if he lost it all. His goal was *not* to use that $100 to fund a long-term poker career, so bankroll management isn't (that) important.
Sounds like he accomplished his goal. Win-or-lose I'm sure he got $100 worth of fun out of the experience. Any winnings are gravy.
Can I run like this please?