My Chipped Elbow

I chipped my right elbow back in college while roller skating.  I was skating backwards, dancing with my partner who was facing me at the time.  Nice gal as I remember (if you are reading this I need your phone number).  We were rolling along quite well until overconfidence caused me to stumble and fall backwards onto my elbow.  I can still feel the chipped place on the bone.  The actual bone chip has disappeared somewhere.  I checked my pockets and the closet....no chip to be found.