YOU save the entire Universe!

You continue through the wall of the house. You have no control. You are a helpless prisoner trapped within the thing that was once your body.
The room is full of people. A party. A party breaking up...
#Target identified#
You see a young man. He looks harmless enough.
#Go. Eliminate target.#
Your right arm raises holding some sort of gun.
A burst of machine gun fire and the young man is a dead man...