Do not forget, Ken Jeong is a real-life physician.

The “Crazy Rich Asians” star swoops into “The Ellen DeGeneres Show” on Thursday and talks about the wild ride he has had being back in standup comedy.

“It was initially very scary, I started virtually from scratch,” Jeong tells DeGeneres. “Over the course of eight months I just really ground it out.”

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“I did a lot of clubs, a lot of improv… casinos, dinner theatres, backyards,” he continues. “I would do everything to try and get ready for it and by the time I shot it I was actually ready for it.”

The 49-year-old actor tells the story of how he leaped into action after one of his audience members suffered a seizure.

“At the beginning of my set, I do some crowd work like an Asian Don Rickles,” Jeong explains. “Someone in the third row was like, ‘Mr. Chow, Mr. Chow,’ and I’m like, ‘Calm down, I’ll insult you later, I’ll get to you.'”

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“And she was like, ‘No, someone passed out.’ I literally dropped the microphone, jumped off the stage and went to help the patient,” he says.  “It was so surreal, yet 550 people in Phoenix being quiet and helping out this one lady who actually had a petite mal seizure and she was passed out, she was unconscious.”

The situation was so severe, Jeong “was thinking to myself, As a physician, I might have to do CPR.”

Jeong stars alongside Jack Black in “Goosebumps 2: Haunted Halloween”, which comes out Friday.