As far as physical pain goes I don't believe I've ever been in excruciating pain, the worst might have been bashing my knee while riding a bike and needing stitches but it really didn't hurt all that bad, it felt more like a really bad bruise. Although the loving needle to numb it while he stitched it up hurt more than the actual wound.
My heart breaking.
Pretty much this, although the chest pains I experienced because of this was probably the worst pain.
Edit: Just remembered the loving muscle under your chin that likes to cramp up when you yawn sometimes.