Initially you would not much pain due to adrenaline. However after a moment, it would hurt so profoundly that it would command all your senses and drive you into a coiled fetal shape on the floor as you writhe in uncontrollable pain until either someone smashes your gut wound with so much immense pressure that it becomes difficult to breathe in order to keep you alive by reducing blood loss until you are taken to a hospital, or you quickly succumb to sepsis from your actual shit in your own intestines leaching into your blood slowly spreading the unending hoard of fecal bacteria towards your brain and you die painfully.