Former Heavyweight champion Mike Tyson may have done a lot in his time…but there’s one thing he will always regret. In a phone interview with AP, Tyson says that he wishes he would have smoked weed with Tupac back in the day.

“He always wanted me to smoke weed with him, and I never did it, and I wish I did. That’s my biggest regret.”

Tyson explained that at the time he didn’t want the media to find out about his smoking habits and thought it would be a bad idea.  He also added that despite Pac living a short-lived life…..he was explosive every second he was alive.

“He didn’t last long, but the time he did last, every minute, every tenth of a moment was explosive.”

Mike and Pac’s friendship was covered in ESPN’s documentary called “One Night in Vegas: Tyson & Tupac,” which aired Tuesday night (Sep 7).