exploding plumbing

Here I was on a nice December day, getting ready to do the dishes when lo and behold: The water wouldn't drain. So I figured that the disposal needed to be run. I ran it, and instead of draining it, it just moved all the gunk into the other sink.

Frustrated I inspected the lower track of the plumbing system. It was dripping. I didn't like this, so I touched it, and it started spraying out black ichor of doom all over. I put a bowl under it after a bit but it was already on the floor and ran outside to get the oil pan. Three gross towels later, I took apart the little loopdy and there was a piece that looked to be a candle.

I thought "Man why is there a candle in the drain pipe?!" But it was somewhat soft, like butter or grease maybe yeah, so um gross. Gross gross gross, must wash hands now!