I had a dream/nightmare once where I killed a friends girlfriend.
It was black and white , and it was around christmas time , they were in a restaurant and I had snuck into the kitchens and poured some poison into her drink I think.
Basically , I walked over to them and brought them their food and drinks , they being too in love didn't notice me bring their order to them.
I set it down on the table and stood watching and they of course not noticing I was there began eating / drinking , the GF then started coughing and spluttering , eventually falling down headfirst onto the table dead ,
I did the "oops!" sign and my friend looked up and noticed me , I just smiled down at him and walked off.
He followed me out into an alleyway behind the kitchen but couldn't see me , he heard my laughter though.
I had a second variation of this dream where I killed both of them , twas weird but I enjoyed killing his now Ex-gf she's a fucking cunt.