MIKE TYSON once cut his now-brain surgeon brother’s arm with a razor blade while he slept and blew up his room in a chemical explosion.
The American boxing legend, 54, opened up about big brother Rodney in 2014 book Undisputed Truth.
In it, Tyson revealed all about his sibling, from being the ‘No1 trauma guy in the country’ to once cutting him with a ‘scalpel’ to recreate a TV show.
Incredibly, Iron Mike recalled fiddling with Rodney’s chemistry set and starting a fire in his room.
Tyson wrote: “We’re black guys from the ghetto and he was like a scientist – he had these little test tubes and was always experimenting.
“I was like: ‘White people do this stuff.’
“He once went to the chemistry lab at Pratt Institute, a nearby college, and got some chemicals to do an experiment.
“A few days later, when he was out, I snuck into his room and started adding water to his test tubes…
“I blew out the whole back window, starting a fire in his room.”
In another bizarre incident, Tyson claimed he and sister Denise cut Rodney’s arm with a razor blade while reenacting a scene from a medical TV show.
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Tyson continued: “I fought with him a lot, but it was just typical stuff. Except for the day that I cut him with a razor…
“He had beaten me up for some reason and then he had gone to sleep.
“My sister, Denise, and I were watching one of those doctor-type soap operas and she said: ‘We could do that and Rodney could be the patient.’
“So we rolled up his sleeve and got to work on his left arm, ‘scalpel,’ I said and my sister handed me the razor.
“I cut him a bit and he started bleeding.
“I said: ‘We need the alcohol, nurse’ and she passed it to me and I poured it onto his cuts.
“He woke up screaming and yelling, chasing us around the house – he still has those slices to this day.”
Tyson went on to say he and his brother are not close these days, but still described him as ‘awesome’ for helping some of friends after being shot.
The boxing icon – who recently revealed he once smashed up a car with a golf club – said: “He’s the No1 trauma guy in the country.
“He’s awesome. He’s taken bullets out of some of my friends.
“He’s stitched them up and they’ve said: ‘Mike do you know your brother is a surgeon?’ I say: ‘Yeah, I know.’
“We don’t have a close connection. Too many demons, too much pain.
“I was used to living in a slum, in a condemned building – but my brother never talks about that. It must affect him.
“He said to me last time we spoke: ‘I heard you have a magnificent book’. But he hasn’t read it.
“He’s just so far away from that world.”