Abs of soreness

My abs class was on Saturday and today is Tuesday … and my abs are still sore. Today it only hurts when I laugh, cough or sneeze. But man.
My whole entire ab area is sore–never had that before. I looked up a sketch of the muscle ab area, click if you are interested. This is a good sore, but still.
Today and yesterday in spin I could even feel my sore abs as I was riding. Now I know that spin can work the abs, too.