were you a bit constipated? you know when the shit finally comes out its so big that it rips your ass? ya, the real painfull shits where your grabbing the sides of the toilet begging god to get the shit out without leaving a bottle sized hole where your asshole used to be? the kind that when you are finally finished your completely covered in sweat from head to toe and your face is as red as a stop sign?
if so, you may have just ripped your asshole a bit, no biggy. next time try a little maylox a few hours before you dare to go back for round two.