I was happily cleaning the outside of my grill and specifically the back by the hopper …. I CUT MY FINGER TO THE BONE as I swiped left to right from the back and caught the ledge of the vent in the back. The lower edge of the metal was razor sharp so I plan to take a file to the hole thing, but man it was a serious cut so figured I'd share since misery loves company, and just maybe it will prevent a future injury. 

OUCH!

...sudden pain!

Look after it carefully.

Aloe and cortisone!

Tetanus booster?

I did the same thing a couple months ago,  only not all the way to the bone.  It took mine a while to heal.