One day while jogging I fell and injured my leg quite badly.

One day while jogging I fell and injured my leg quite badly.

The doctors had to replace my patella with a metal one. It never seemed to sit quite right, and later it slipped out of the stitches onto the road. I went to grab it, but was slippery and rolled right though the sewer grate. I stood, dumbfounded - unable to grasp the iron knee.