It's realistic, I vaguely remember one story from someone who dislocated his shoulder in his teens and had to have a doctor pop it back into place. Apparently they didn't have regular pain killers, so they gave him something that induced amnesia and just had clinic staff hold him down. He doesn't remember any of it at all.

Granted this happened ~50 years ago so I don't know how embellished the story became over the years, or how pain science changed since then.