I've had this happen during moments of going to the ward. I was hospitalized one time and have very little memory of it besides when I woke up strapped to the bed. Apparently I was making threats, but I don't remember a thing. That could have been due to the overdose.
Apparently there were things said at the hospital by the doctors that my grandmother remembers, but I can't recall.
I have very little recollection of things from before I was about 9 when I started really struggling with MI. I was a big daydreamer when I was younger though and would zone out some times.