Stupid and violent dream

I don't know why, but when I post here it always seems like I post the bad dreams. I guess because they're the ones that stand out the most in my mind.

I was at some kind of party, absolutely packed with people. Mostly friends. For some reason, though, I was angry with most of them. I had a weapon on me that was small like a taser, but it had a cloaking device on and only I could see it. It fired like a machine gun, only silent. So I walked around the room and was shooting EVERYTHING in sight, including people. I'd have to shoot people five or so times before they died, though. So people were dropping like flies all around the room and things were shattering. I started to feel bad, though. One of the guys pulled out a gun and said "All right, who's doing this?" I felt a bit guilty, so I raised my hand. He shot me in the head immediately. Then I woke up.

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