Dwayne was just 15 when he witnessed his mother attempt suicide

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“I reached a point where I didn’t want to do a thing or go anywhere. I was crying constantly.”

Johnson, 45, whose new sci-fi monster film Rampage hits UK cinemas this month, is said to be worth £156million after two successive years as America’s best-paid actor.

But the 6ft 5in muscle man was just 15 when his mother Ata tried to kill herself in front of him, months after they were evicted from their apartment.

“She got out of the car on Interstate 65 in Nashville and walked into oncoming traffic,” he said. Big rigs and cars were swerving out of the way.