Derrick Poage said at first he thought the gunfire was a prank, but quickly realized he needed to run for his life.
"I was scared. I thought this was going to be my last day. I thought me and my girlfriend were going to die," said Poage.
It was a moment of pure horror and terror.
"He was the bottom right where the exit was. He started shooting people on the bottom rows. At first, I thought it was a prank and then, at the fifth gunshot, everyone actually starting screaming and running. That's when I realized it had really gotten real."
He said the chaos turned to pandemonium.
"He started aiming up at the top rows and then he was close enough that I could see a gas mask. He was dressed in a SWAT uniform type thing. He had a rifle and a handgun. The shots were like loud. I saw people falling and people getting shot in the arm. Then a man had gotten shot in his head by his ear."