Dwayne Johnson Proves He's a Real-Life Hero, Visits Sick Kids During a 'Baywatch' Break: 'This Will Always Be

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Dwayne "The Rock" Johnson is following in Zac Efron's footsteps.

Just four days after his Baywatch co-star bought a brand new iPhone for a fan who shattered his while attempting to take a photo with the actor, Johnson decided he would also pay it forward.

WATCH: Zac Efron Saves the Day After a Fan Trying to Meet Him Shatters His Phone

During a break from filming the R-rated big screen reboot, the 43-year-old actor made a surprise visit to the Memorial Health Children's Hospital in Savannah, Georgia, on Saturday.

Following the meet-and-greet, he took to Instagram to share a sweet photo of himself mid-fist pump with an adorable boy named Aiden.

"I surprised the children at Savannah's Pediatric Specialty Ward aaaaand look at the concentration on lil' Aiden's face!" Johnson captioned the snap. "Awesome experience and THANK YOU to all the hard working and caring staff who helped make this visit possible."

WATCH: Dwayne Johnson Announces David Hasselhoff Will Return for 'Baywatch'

"To all the kids I met - you guys keep smiling and staying strong," he continued. "All the mamas and daddy's I met, y'all stay strong too. Gotta tell ya little stuff like this will always be the best part of fame. And good Lord I wish I had Aiden's concentration when I was in my high school math classes. I wouldn't have failed Algebra twice."

WATCH: See Dwayne Johnson and Zac Efron on the 'Baywatch' Set

In between visits to the hospital and time on set, Johnson and Efron have been hard at work at the gym, getting their bodies in perfect shape for the steamy characters they portray in the film.

ET was with Johnson on the Baywatch set earlier this month, where he and Efron couldn't stop gushing over each other's incredibly hot bodies. Hear more in the video below.