Back in March, Mötley Crüe postponed their Las Vegas residency under mysterious circumstances, revealing only that their frontman Vince Neil had to “undergo a medical procedure.” Now, Neil is opening up about what happened: He shared with the Las Vegas Review-Journal that he suffered a stroke during his sleep on Christmas and was forced to learn to walk again and underwent months of physical therapy.

He recalled in the interview, “My whole left side went out. I had to learn to walk again, and that was tough. The doctors said they didn’t think I’d be able to go back on stage again. I go, ‘No, no, I’m gonna do it. Watch and see.’”