Propofol
anesthesia
"I had my first colonoscopy yesterday and was really anxious about the sedation.  I've had conscious sedation before and was ALWAYS aware of the procedure being performed.  Not so with Propofol.  I was out in about 5 seconds.  Next thing I knew, I was in recovery.  I felt pretty stoned for an hour or so afterwards, but it wasn't unpleasant!"