Most serious NBA fans and a lot of casual fans of the league have stumbled onto the thing where opposing teams and their supporters count down from 10 while Milwaukee Bucks superstar big man Giannis Antetokounmpo gets ready to take a free throw.

Not only does that practice exist for reasons beyond trying to distract the Greek Freak, but it is related to a lesser-known Rule in the league the public awareness of can be traced back to an incident involving Paul Pierce, the Boston Celtics, and big man Dwight Howard more than a decade ago. So what exactly is going on with that countdown and the weird rule tied to it?

The hosts of the “Secret Base” podcast put together a clip featuring some of the weirdest rules in sports and the absurd stories behind them, and of course, the Celtics were involved.

Take a look at the clip embedded above to hear this story and several others about some particularly odd sports rules.

Listen to the “Celtics Lab” podcast on:

Apple Podcasts: https://apple.co/3zBKQY6

Spotify: https://spoti.fi/3GfUPFi

YouTube: https://bit.ly/3F9DvjQ