Shitploisions! iin?

Okay well basically I had to shit really badly so I went to the bathroom sat my ass down and then something odd happened. Shit wasn't coming out at first but I felt something building up into my abdomen area and then I felt it move slowly down towards my anus area and then...

PPLLLFFSSGGHHT!!! My shit literally exploded out of my ass. I had a shitplosion. 8O -(my face) It threw me by surprise and it hurt a little. But that was it though - nothing else needed to come out and there wasn't much residue even left on the tissue. What the hell is wrong with me? Is it normal?!