Homer Simpson Abs

I was listening to Kevin & Bean this morning while driving and laughing so hard that my sides hurt.  Then I noticed a popping or clicking sensation on my right side just beneath by ribcage.  It only happened when I laughed.  When I got to the gym and looked in the mirror I realized that my 6-pack was really a 5 1/2-pack.  A portion of my abdominal muscle actually rests "edge to edge" with my ribcage.  The "popping" sensation was from the abdominal contractions I had while laughing.  It was popping back and forth between my ribcage.  I can push down on it and feel it pop behind my ribs and spring back.  If I push firmly you can actually hear the popping noise.  It sounds like a tiny bongo drum. 

As a result of the asymmetry, my torso bears a striking resemblance to Homer J. Simpson.

Weird.