as Cajole once did, I also suffered from multi-orifice output. It was the result of a very old frozen pizza that I was sure would be okay to eat, as it turned out, I was seeing it again very soon thenafter.
I felt like a tube of toothpaste that was being squeezed. I was sure I was feeling my lifeforce itself exit my body.
BTW, does anybody know what exactly happens to a fart when you hold it in? Where does the gas go, does it exit the body through other means, does it slowly leak out, is it absorbed by the body? What happens, really, I want to know.