I remember the insertion, the stomach, the doc saying he was taking a biopsy and
telling the nurse/assistant when to activate the tools, and
the pulling out of the tube
. I remember clenching down and the feeling of the tube in my throat. I remember it all.
If you're having this procedure just make sure they sedate you properly. If they ask, tell them you're a heavyweight. I thought they could get a better idea by using body weight/age/height, etc.