At age 12, Johnson was diving and hit his head on the concrete platform, plunging into the water unconscious with his "scalp ripped in half." He opened up about the accident in the above video and a subsequent interview earlier this year, revealing that he still suffers memory loss issues to this day.
“I just kind of hid it from everyone for the past few years,” Johnson told the Indianapolis Star. “My girlfriend has recently helped me start to work on getting this memory back. Because if you tell me something two weeks ago, I probably won’t remember."
Johnson didn't let the accident or fear of getting in the water slow him down. Instead, he followed his passion to the Olympic podium Monday. "The cool part of the story," he said, "is something that almost killed me has become the thing that I’m best at."