“Saturday Night Live” host Chris Rock returned to his old stomping grounds at Studio 8H and got a bloody warm welcome from Adam Sandler — his friend and fellow alum of the show — in a sketch this weekend. (You can watch Sandler’s surprise “SNL” return below)

Rock played a doctor doing surgery on a patient when he discovers that a nurse named Linzley (played by Sarah Sherman) carelessly marked the surgery down as a gallbladder removal instead of an appendix removal.

The “embarrassed” nurse immediately owns up to the mistake but, as the team of doctors rushes to remove the inflamed appendix before it bursts, she gets caught up on whether they potentially “hate” her.

After Linzley takes heat from the doctors, Sandler wakes up from under a sheet on the operating table and claims he wasn’t “given enough anesthesia.”

“I heard the way you guys were talking to her and it’s not OK,” said Sandler as fake blood began to ooze out of him from a “punctured” artery.

He declared that every workplace needs a “coworker to rag on” like Linzley and made rounds shooting fake blood at the “SNL” cast members in the sketch including Rock, another one of the “Bad Boys” of the show in the ’90s.

“Oh, thank God he skipped me,” said Rock with a sigh of relief.

“No, no, no. I was just getting to you,” said Sandler, who aimed the fake blood stream at the fellow comedian while trying not to break character.

“How much blood you got?” asked Rock as he struggled to avoid it.

“You know what? Apparently a lot,” replied Sandler, who added that the doctors had been “so, so good” to him.