Jack Black experienced a sense of completeness for the first time after experimenting with psychedelic drugs at the age of 13.

As a teenager, Jack Black remembered how a school therapist helped him overcome his drug problem.

In a recent interview on Dax Shepard's "Armchair Expert" podcast, Black discussed his experiences with psychedelic drugs and cocaine as a teenager, and admitted he started experimenting with cocaine in middle school.

"At 13, I received my bar mitzvah and became a man, which made me ready to try out drugs," he said to Shepard. "Additionally, I was just getting into heavy metal music, and while I don't blame the genre for my dark path, it was definitely a significant part of my rite of passage in a Beavis and Butthead way."

He stated that as a child, he believed "being a man" meant "going to the dark side and surviving it," emphasizing the importance of "dangerous" activities.

"Kung Fu Panda" actor revealed that he experimented with acid for the first time as a teenage boy when an admired older friend offered it to him. He relocated from Hermosa, where he always felt out of place, to Culver City, where he discovered bands such as Black Sabbath and felt like he belonged.

"I looked up to him like a big brother figure, or I wanted a father figure, even though I had a great dad, but I wanted the dark dad. I wanted the one that was going to show me the ways of the dark side. And this guy filled in that role. We did acid, and I remember that night laughing as hard as I’d ever laughed and having this strange feeling of being whole for the first time and suddenly this big dark mysterious universe that I didn’t know how I fit into all felt right."

"I was just getting into heavy metal music, and I don’t want to blame heavy metal music for my dark path, but it was definitely the rite of passage in a Beavis and Butthead way." — Jack Black

He recounted a "weird spiritual experience" while on psychedelic drugs, describing it as enjoyable until it became unfun. When speaking to Shepard, he described the "darkest day or night" in his life when the drug's effects would not subside and it persisted.

"He was trapped in a mental institution where he could only see chess pieces moving endlessly in a game with himself. He was terrified of never escaping and felt like the first hour and a half was not worth it. Thankfully, he made it through the night without sleeping."

Black's experimentation with psychedelics led him to try cocaine for the first time, with the actor saying he "was down to clown with anything [his] big bro crew of heavy metal maniacs" were dabbling with.

He remembered feeling a "rush," similar to the sensation he experienced when he first took acid, which made him feel as if a "doorway had been opened in his brain," allowing him to "spew out a lot of brilliant ideas for hours on end." Looking back, Black is glad there were no cameras around during his high, as he now finds it "embarrassing" to think about.

"He explained that it provides a brief energy boost, allowing you to explore deeper with others than usual. This may be why Freud frequently employed it in therapy sessions, enabling them to delve deeper into their own personalities and the intricacies of their thoughts and emotions."

As a result of his drug use and a conflict with a friend group member over a girl, Black was transferred to a school for at-risk youth.

Here, Black discovered his passion for theater and sought various ways to cope with his difficulties.

"Deb Devine, a theater teacher, taught us improvisation games and encouraged us to think about storytelling. It was a form of therapy that helped us work out our demons by playing roles and coming up with spontaneous dialogue."

He ended up in the school therapist's office and, despite not anticipating it, he confessed to Shepard, "It only took me a minute to start pouring out all the crap I was carrying around... the drugs, but mostly the betrayal of my mom who always provided unconditional love for me, and she didn't know that I had stolen money to buy the drugs. And I broke down in tears."

After his theater teacher recommended it, Black transferred to Crossroads, a private school in Santa Monica with an excellent theater program. From there, he went to UCLA for theater but eventually dropped out to pursue acting full-time after landing a role in the Actor's Gang Theater Company.

Although he has achieved success in other areas of the industry, theater is where he feels most comfortable. Since then, he has starred in many successful films, including "The Holiday," "Nacho Libre," all four "Kung Fu Panda" movies, "School of Rock," "The Super Mario Bros. Movie" and many others. He is also one half of the very successful rock duo Tenacious D.

"He recounted his time at Crossroads, describing a dream he had of being in the theater with the ability to fly like a superhero. He could use his powers to fly out of the theater doors, but would immediately lose them and be left as a regular human. He emphasized that this dream captured the creativity of the theater and that it will always hold a special place in his heart."