Don't Come Up! Don't Come Up!

The water in a toilet is supposed to go down. It wasn't fun when it went over the top. It also wasn't fun when the shutoff valve didn't want to turn at all. It wasn't fun when using the wrench on the valve (while the water was still coming out I would like to note) and having only the handle spin, but not the shaft. I have the feeling this is going to be a fun project. At least it is only in the downstairs bathroom.