A doctor who saved the life of a premature baby saw him return the favour 26 years later in an incredible twist of fate.
Chris Trokey was born several weeks early in 1985, weighing just 3.2lbs - he was given just a 50/50 chance of surviving.
But Dr Michael Shannon, a paediatrician, worked round the clock to make sure the newborn pulled through.
Then several decades later, when Dr Shannon was driving through Orange County, California, he was involved in a horrific crash with a truck.
The smash left him pinned to the floor as his vehicle caught fire and flames started to burn his legs.
Incredibly, Chris, who owes his life to Dr Shannon, was one of the first rescuers on the scene.
The 26-year-old grew up to become a firefighter and helped the crew extinguish the flames before cutting a hole in the wreckage and pulling Chris out.
Seriously injured Dr Shannon was taken to Mission Hospital where he spent the next 45 days recovering and also had two of his toes amputated.
While recovering from surgery, Chris visited the hospital and discovered the unthinkable coincidence.
He said: “I didn’t know about until I went to the hospital and started talking about it, Dr. Shannon. And I was like, ‘Oh my gosh, Dr. Shannon?'”
Dr Shannon told KTLA: "It's amazing to watch them all grow up, but to have one come back in your life, on a day you really need it, that's really incredible."
The pair reunited this week to shave their heads to raise funds to fight cancer.
Chris recently became a father and his paediatrician is - you guessed it - Dr Shannon