My favorite point was the "What if everything goes right?" shirt. So many people are quick to bring up areas I may have overlooked or potential pitfalls. All I want to say is, "Trust me, I've obsessed over this for years, but I appreciate your concern."
There are endless talks about FI with numbers and we all have heard the "Shockingly Simple Math" talk a million times. He likely just used percentages to be modest. Valuable talk and funny take on certain aspects of FIRE!