Half of his skull is still frozen and is expected to be reattached in the course of the next surgery.
"He was walking around with neither side in".
McKinley, 13, had been injured in a dune buggy accident in Alabama earlier this year, and his mom tells Fox 10 News that doctors said he would never be normal again.
"The next day he was scheduled to have his final brain wave test to call his time of death but his vitals spiked so they cancelled the test", Reindl said.
The teenager suffered seven skull fractures and has been in hospital ever since the incident. The day of play soon turned terrifying.
"I hit the concrete and the trailer landed on top of my head", McKinley told Fox 10. "After that, I don't remember anything", said Trenton.
His mother, Jennifer Reindl, described the traumatic sight of seeing her son on a hospital stretcher with "his feet hanging out".
His mother, Jennifer Reindl, said she signed the papers to donate Trenton's organs because five kids needing transplants were a match.
The parents were told it would be almost impossible for their son to recover from his injuries, and that he would most likely be a "vegetable" for the rest of his life. "They instructed me the oxidation issues can be so risky to his mind, that he can be a vegetable if he even made it".
Trenton remained brain dead and was barely breathing in the days following the crash.
Days before the doctors were set to pull the plug, Trenton reportedly started showing signs of life.
Trenton said he believes he went to heaven before he came back to life. "There's no other explanation but God".
Doctors were not hopeful about Trenton's prognosis, explaining to his parents that he would "never be normal" again even if he did wake up from his injuries. But the joy is tempered with deep worry because Trenton still has his struggles.
"He's a miracle and he just amazes everybody". "Every day, he just does more and more". He has since lost 50 pounds, and deals with nerve pain and seizures daily. Despite all that, this kid's still got a great sense of humor. "She wouldn't let me put nothing in it though. No more washing dishes for me!" laughed Trenton as he referred to the dent in his head.