He Left His Mark

After watching the final episode of Breaking Bad several times, I finally noticed something in the last scene, proving once again that the people involved in the show really put a LOT of thought into the tiniest details.

Here's a short video of the ending:

I hadn't noticed that when Walt's bloodstained hand slid down the stainless steel vessel, it had left a distinct "W".

It might have just been an accident, but I don't think so.