My key takeaway is that you ways have to your eyes open for opportunities to level up. I am certain that the janitor's coworkers could have come up with this idea too, but he was he one that took the initiative to reach out, put her a deck, package the product, and present the product.
I also think a less courageous an would have given up during some part the process (e.g. Being told to give a presentation when he's never done when and when he wasn't confident in his English), but he never quit.
Always push yourself you'll be surprised at what you can achieve.