Read about him...especially his activism. Seriously.
If you weren't following the NBA in the late 1980s and early 1990s, it's hard to describe Manute Bol. Manute wasn't a great player -- although, as Neil Paine of Basketball-Reference pointed out, he was one of the most prolific shot blockers in league history -- but he was unlike anything anybody had seen before. It was part cultural phenomenon, part freakshow. And I don't mean that in a negative way. It's just that you couldn't not stare at Bol. I watched him play the Pacers twice in person, and I was transfixed (although Manute didn't log many minutes).
I mean, the dude was nearly eight feet tall. He once blocked four shots on a single possession. He even drilled six three-pointers in a single half (against the Phoenix Suns...of course).
Like I said, he was unlike anything anybody had seen before. And we'll never see anything like him again.