Sooo yeah I had a dream...
I was sitting behind a man and a woman in a pretty uninteresting room. From what I'd gathered I was an assassin of some kind and the woman was distracting the guy so I'd be able to kill him. To the right behind a pillar was a guard and further to the right was a hallway filled with security guards.
Eventually I'm standing right behind the guy and the woman has run out of patience and turns away muttering at me to get it over with. By now my heart is racing and I'm shaking pretty bad.
I grab the guy's head and stab him through the neck. It feels so real and I immediately feel so disgusted. Except it gets worse, blood begins flowing from his wound and despite this wound he begins to scream in absolute agony. I keep stabbing and more blood keeps flowing and his screams just get louder. The guards are coming and I'm slashing now at the guy's throat but the scream just keeps getting louder and louder until eventually I wake up.
I have no idea whats caused my subconscious to imagine this and I was pretty horrified myself.