Dwayne “The Rock” Johnson took to Instagram to post the ultimate Throwback Thursday photo, telling followers that he hit puberty so early that many classmates mistook him for an undercover cop.

The black-and-white yearbook photo shows that The Rock hasn’t changed very much, although he has since abandoned the hair and mustache. The actor hilariously reveals that his “porn ‘stache” made him look like “a man child.”

“I was also 6’4 225lbs, rockin’ a dead caterpillar on my lip (aka the porn ‘stache) and all the kids in every high school thought I was an undercover cop cause I looked like a mutated, yet handsome SOB of a man child.”

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In the post, the actor also discloses his troubled past. He wrote that by the time he was 16 years old, he had been enrolled in four different high schools due to evictions and trouble with the law. In Nashville, he was hanging out in dive bars and “hustlin’ cars from crackheads.”

This is why, the post reads, he is grateful for how far he has come since The pre-Rock pictured in the photo.

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“Yup, one of the many reasons why I’m a grateful man for the life I have today and also grateful I straight up kicked puberty’s ass early in life. #GodBlessSamoanAndBlackGenetics #AndGodBlessOurTeenageYears #AndWTFWasIThinkingWithThisMustache.”

See the photo below.