Maybe you've seen this short film.
The first thing that made me smile was how willing Caine was to do his art regardless of how the world responded (it didn't). Caine didn't care. The goal wasn't to be accepted, the goal was to do it right.
The second extraordinary thing is easy to miss. Around 3:30, you learn Caine's folk-arithmetic trick of using square roots to validate the PIN numbers on each fun pass. Extraordinary.
And the third? Starting around the nine-minute mark, any entrepreneur with a heart is going to shed a few tears. In the immortal words of Caine Monroy, "and I thought they were here for me, and they were."