Over a week later, McGraw made light of the incident on Instagram when he posted an underwater action shot of him deep-sea fishing.
Calling out his recent health scare, the "I Like It, I Love It" singer quipped in the caption: "Hydrating."
On the night of McGraw's collapse, nobody was laughing. After the incident, his wife, country singer Faith Hill, addressed the audience alongside the members of his band, and explained that the musician had been "super dehydrated," and that his performance could not continue.
"I apologize, but I made the decision that he cannot come back out onstage," Hill said in a video shared on Instagram by a concertgoer.
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Tim McGraw Collapses on Stage During Country Music Festival in Ireland
Another eyewitness at the concert told ET that the collapse occurred right after McGraw performed his 2015 hit, "Humble and Kind."
"As the lights dipped to black, McGraw walked to the side of the stage where he appeared to trip," the eyewitness said. "The band and crew rushed to his aid and he was taken offstage. There was confusion in the crowd when the lights went back up until an announcer said there was a medical issue."
The very next day, however, McGraw was seen smiling as he exited building with Hill. Here's more on his scary fall: