brett, meet ur first person, lol.(firstly to anyone not wanting to read about the rare negative effect of anaesthetic please read no further as i sincerely dont wish to frighten anyone)
in fact, its happened to me twice but both different scenarios.
first was when i was given a general anaesthetic for a d&c operation. i went to sleep just fine (although slower than they expected) , the problem was i woke up far to early.
i remember choking and trying to open my eyes and wondering why i couldnt see. problem was they were taped shut and i had a tube down my throat which i grabbed and pulled. as much as i did panic i wasnt in any pain as the operation had just finished although my legs were still in stirrups at that point.
the second occasion was not a general anaesthetic but a sedated procedure.
as the sedative was administered in my hand i waited for some woozy feeling or something and then i felt pain (i was having a deep colonoscopy). this was severe and i tried to shout that it hurt but no words would come out. i was understandably frightened and after what felt like ages i breathed in and screamed at the top of my lungs (this sound definately came out, big time). basically i was surrounded by voices i could hear but i couldnt open my eyes or do anything other than scream, after a few more seconds i was gone so i can only assume i was given something to take me deeper. i remember waking up screaming and crying and remembering the whole ordeal vividly.
obviously these are now on my medical file and i will make sure any wls surgeon is made fully aware of my situation with anaesthetics.
i believe i am a rare case indeed (i just have to make a point in being awkward, lol)