Answer and Explanation:
When I reached the movie theater, I saw faces excited and curious about the film that was to be broadcast, but after a few minutes I could only hear a very loud, deafening crack! A shot!
People started running in a disorderly way and I could hear lots of screams and noise of people falling and running over each other. Chaos mingled with the movie's audio and everything got really scary, until the security exit opened and everyone started running out of the room, in complete chaos.
I couldn't see from where in the room the shot was released, but as I ran out of the room I tripped and fell and looking to the side I could see someone's body on the floor, in a pool of blood. I believe this person was shot. Terrified, I got up shakily and ran to the exit, where I awaited the arrival of the authorities.