Dwayne Johnson tweets: 'Superman is on the mend' after emergency surgery

Dwayne "The Rock" Johnson didn't let a little thing like surgery for three hernial tears keep him from getting into graphic detail about the procedure and — of course — flexing his guns.

Wearing a shower cap and Superman t-shirt while recovering from the emergency operation, the 40-year-old WWE star tweeted from his hospital bed: "Surgery a success! Dr repaired 3 hernial tears (fun pain). Superman is on the mend.. #WeFallWeRise."

Johnson underwent the emergency hernia operation on Monday to repair injuries he sustained during a WWE match with John Cena earlier this month.  The abdominal surgery forced him to miss the Hollywood premiere of his new movie, which is ironically entitled Pain & Gain. 

Surgery a success! Dr repaired 3 hernial tears (fun pain). Superman is on the mend.. #WeFallWeRise twitter.com/TheRock/status…
— Dwayne Johnson (@TheRock) April 23, 2013

Pain & Gain director Michael Bay apologized for his star's absence. "Dwayne's hurt tonight. He was pushing it too hard," joked the blockbuster filmmaker. "He needs to grow up and stop wrestling 300-pound men."

The Rock tweeted some graphic details before the surgery too.

"Saw my Dr who had to push my intestines back thru the tear in my abdomen. Kinda romantic. Surgery is next week. #BringItOn," he wrote.

According to WWE.com, Johnson injured his midsection during a match with Cena on April 7, during a WWE Title defence match for WrestleMania 29.

"In the middle of last night's Wrestlemania match I tore my abdomen & abductor muscles off the bone.," he tweeted. "Just part of the job."

On April 13, The Rock explained: "Drs & I elected not to reattach tendons to my pelvis. They'll just scar up."

Now wonder this guy's got so many fans in the theaters and outside the ring.

WWE's John Cena bumps Fred Flintstone from Pebbles boxes

Pro wrestling has a history of larger-than-life characters throwing each other out of the ring but this has to be a first — knocking a caveman off of a box.

That's exactly what WWE Superstar John Cena has done by replacing the iconic Fred Flintstone on the popular Fruity and Cocoa Pebbles cereal boxes.

Yabba Dabba Don't.

Fred's stint on the sidelines won't be permanent because Cena's guest spot with Bamm-Bamm is for a limited time promotion.

"It's been a life-long dream to be on a cereal box and I'm proud to represent WWE as a partnership with Post," said the 10-time WWE champion.  "I'm looking forward to joining millions of families at their breakfast table across the country."

The idea came about by chance after a 2012 promo for WWE featured fellow Superstar Dwayne "The Rock" Johnson calling out Cena.

"Enjoy your Fruity Pebbles, you Yabba Dabba b---h,"he yelled.

The family-friendly WWE and Pebbles cereal seemed like a perfect match.

Johnson later tweeted to Cena: "I assume my royalty check for this is in the mail #YoureWelcomeJohn."

The boxes featuring Cena are in stores now.