“I thought that the bloody handprint on Dean’s shoulder when Cas tossed him out of the way was unnecessary! Yes, we all know that Cas saved Dean initially from hell, we have not forgotten! That was a little too on the nose for me and not logical, because where is the blood coming from??”
I’m pretty sure Cas’ hand was bleeding because of the blood sigil he drew on the door to protect them from Billie. I could’ve done without the hand print, but I got it and it didn’t bother me that much.