Does the phrase "I once was going an appendectomy" mean "I once was going to receive an operation - appendectomy"? But what follows appears to point out the speaker himself is a doctor who does appendectomy for his patients. Does the phrase mean that the doctor himself became a patient to receive the operation?
I once was going an appendectomy. I cut into my patient’s abdomen and immediately get a weird feeling. When I looked inside, my heart dropped.
Source: Factinate tweeted