Davis tells the You Rock Foundation: "When I got my panic attack I thought I was going to die. I didn't know what was going on. That was one of the reasons why it's so hard to deal with anxiety and depression. You don't know what's going on; you think you're going crazy.

"I started thinking meds were bad for me. I turned schizophrenic for a while. It was a really, really tough time." He adds of his depression: "It's like walking around with a giant lead blanket on you. Nothing excites you. The concept of happiness you can't get into.