Before someone questions me, this is a phenomenon that has been documented. https://www.sydney.edu.au/news-opinion/news/2022/05/24/during-general-anaesthesia-1-in-10-people-may-be-conscious-follo.html
https://www.bbc.com/future/article/20190313-what-happens-when-anaesthesia-fails
Forgive me if this is the wrong place to post; c/mutualaid feels like it would draw attention away from people with more urgent issues, and c/mentalhealth is very inactive and rarely anyone ever sees it.
Thanks for bringing number sense here - It is absolutely a phenomenon, but it is also a frequently overstated one.
These kinds of events (as well as risk of death) also predominantly include other complicating factors, like recent alcohol misuse, nervous system damage, drug contraindications, etc. As an otherwise healthy person I suspect your risk will be significantly less than even 0.05%.