Our sink backed up last night. I don't want to lay blame, but it might be related to the pile of carrot peels that Kelly shoved down the garbage disposal. Anyways, today I stayed home to fix it. It turned out to be pretty easy. All the pipes were plastic and they had screw-on connectors, so I could easily remove the section of pipe that was clogged. Now everything flows normally, but I still have to reseal the connection with the garbage disposal with plumber's putty.