The Baywatch star took a brief break from production on the set of his new film to meet a special needs fan, and posted the story, along with a photo of their meeting, to Instagram on Monday.
"Thank you universe," the actor began. "I was on set this morning ready to start our shooting day when I got word that there was a family with a special needs young man named RYAN who was hoping to meet me."
He continued, "They understood that they travelled in unannounced but they were willing to wait all day until I wrapped to meet. That would've [been] 12hrs. Way too long."
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So instead of making Ryan and his mom wait the entire day for an impromptu meet and greet, Johnson wrote that he "asked production to hold" and walked across the beach to meet the young fan.
After getting a big hug from Ryan's mom, who cried "Thank you, thank you" as she embraced the actor, Johnson met with Ryan, his brother and his nurse.
"Without getting into the details, this kid has waaaaaay more heart, is stronger and tougher than I could ever imagine," Johnson wrote.
"When that mama hugged me today and I felt her start to cry... that stuff gets me every single time I hug a parent in these situations, because I'm a parent too and will do anything to make my babies happy and put a smile on their faces," he added.
Johnson then expressed his gratitude for having the opportunity to put a smile on people's faces. "I know I'm a lucky guy to be in this position and have this platform," he explained. "I'm grateful and moments like this will always be the best part of my job."