Pooping out a small portion of your intestines is entirely possible and I've read about a few cases of it happening to a few people.
So it can happen that you have a small part of your intestines protruding from your anus if you poop too hard and if you do then you should seek medical treatment as soon as possible.
It's very rare that people poop out part of their intestines though so I wouldn't worry too much about it.
It's only happened to around 1 out of 40,000 people for their intestines to be pooped out so it happens but it's very uncommon.
Although it's possible to poop out part of your intestines it's not possible to poop out your entire intestines so there's really nothing to worry about.
But if it does happen see a doctor or go to the emergency room.