In an interview with Smithsonian magazine's Claudia De La Roca, The Simpsons creator Matt Groening talks about his dad's distinctive hoops skill:
What did your father do before he became a filmmaker?
He grew up on a Mennonite farm in Kansas, speaking only German until he went to school. My father then ended up as a bomber pilot flying a B-17 during World War II. After the war, he was a surfer, filmmaker and ardent amateur basketball player. He perfected a basketball shot that he could shoot—without looking—over his head and consistently make from the top of the key. He made that shot for 30 years.
I always wonder what happens to guys like that. They have this skill people would love to see a few seconds a year. I guess the move is to just wait for the Celtics' mascot to visit some local gym, get the video camera rolling, and then show him who's boss on YouTube.