The Unforeseen Long Run?

Today, which I will admit is supposed to be my long run day, I did 18 miles with Sam and The Polish Eagle(a.k.a. John). I had been thinking during the week of doing 18 today but by this morning had decided I may only do 15 to 16. In true runner form though, Sam and The Eagle talked me into doing a few extra. I think that in the long run it will prove to be beneficial for me but that does not mean that my body is not paying for it now. OUCH! The pain will go away and my legs will be all the better for it. It is good sometimes to have people push you a little further than you wanted to go. How else will you truly find what your limits really are?