I uncovered a hole in the drainpipe about twice the size of my palm. I was able to fit both hands into the whole at once.
During the digging, I was thinking, "this sucks. I wonder if we can possibly afford to get it fixed by a professional." When I finished, though, I didn't feel too badly--I went on to try to do other housework.
Today, though, I feel fairly sore. Most of it is a pleasant soreness, but the soreness of my belly muscles keeps making me think that some sort of digestive distress is going on.