Matthew Perry detailed the terrifying moment he 'smashed his head into a cement wall' until he was 'covered in blood' during a scary rehab breakdown.
The Friends star has recently opened up about his battle with drink and drugs addiction, revealing some horrifying life experiences.
He explains the pain and suffering he went through in his new tell-all book Friends, Lovers, and the Big Terrible Thing – detailing life in and out of rehab.
The 53-year-old speaks about one particularly scary experience during his time in a New York treatment centre, five months after spending time in hospital.
His colon had "exploded" and he had just had his first surgery.
He was wearing a colostomy bag at the time of the horrifying ordeal.
Matthew speaks of the moment 'therapists were on the floor below' him while he was walking through the hospital and walked down a set of stairs in a state of "total confusion".
He recalls stopping in the stairwell before years of his life began playing in his mind 'like a montage'.
From being abandoned by his father as a child, to growing up playing tennis and 'pining for his mother's affection', the moments played in his mind.
"I'll never be able to fully explain what happened next, but all of a sudden, I started slamming my head against the wall, as hard as humanly possible," he explained.
"Fifteen-love. SLAM! Thirty-love. SLAM! Forty-love. SLAM! Game. Ace after ace, volley after perfect volley, my head the ball, the wall of cement the court," Matthew wrote.
He added: "All the pain on the cement and on the wall, and all over my face, completing the Grand Slam.
"The umpire screaming, 'GAME, SET AND MATCH, UNACCOMPANIED MINOR, SIX LOVE, NEEDS LOVE, SIX LOVE. SCARED OF LOVE.'
"There was blood everywhere," he concluded, saying after "eight of these mind-numbing slams" someone stopped and asked him "Why are you doing that?"
Matthew said: "I gazed at her, and looking like Rocky Balboa from every one of those last scenes, I said: 'Because I couldn't think of anything better to do.' Stairwells."
In a recent interview with The New York Times, Matthew admitted that fighting his addiction led to him shelling out seven figures as he fought to overcome his demons.
He said: "I've probably spent $9 million or something trying to get sober."
Frank offers confidential advice about drugs and addiction (email frank@talktofrank.com, message 82111 or call 0300 123 6600) or the NHS has information about getting help.
If you are struggling with mental health, you can speak to a trained advisor from Mind mental health charity on 0300 123 3393 or email info@mind.org.uk
