Washing my truck working from the wheels up.  I noticed that the rear Drivers side looked whorable  Black everywhere like a granade went off in the wheel.  So I knew then that the breaks were bad.  I had never felt anything, no squeeks or foul play was appearnt.  I pulled the wheel off and released the caliper.  The inner pad was just gone, the metal backing plate was sevearly mared and had taken it's tole on the Rotor.  It too was sevearly mared with 1/8" and 3/16" gouges in the rotor.

Here is the inner pad...

You can kind of see the high and low groves in the metal backing plate.

Here is the Rear Drivers Side Rotor.

A couple comparison shots of the rotor's: