it happened to me just yesterday. i got my wisdom teeth pulled and the experience wwas just horrific. first, when the nurse was situating my IV , it apparently slipped. the monitor was beating fast and they wouldn't even tell me what was going on until it was fixed and the monitor was back to normal. then, i woke up during the procedure. i remember being awake and seeing what was going on but the voices sounded like they were so far. i could hear the instruments and feel the discomfort of it, but it wasn't necessarily pain. i couldn't move or tell them what was going on. it was a terrifying experience, but i'm over it and feeling pretty good today. i'm glad to hear that other people have experienced it.