(Jason Sickles, Yahoo!) -- Moviegoer Jennifer Seeger was watching the Batman movie from the second row when the gunman wearing what appeared to be a gas mask and body armor burst into Theater 9.
"He came in and he threw in the gas can and then I knew it was real," Seeger told NBC News. "Then he shot the ceiling. Right after he shot the ceiling he pointed the gun right at me. At that point I drove into the aisle and I got lucky because he didn't shoot me.
"Then he started to shoot people behind me and the bullets were falling on my head. It was burning my head it was so fresh. I could smell gun powder. At that point he went up the stairs. "He started at the very corner of the screen. And then he worked his way all the way through the back and back down. Like all the way to the top of the stairs and back down."
Police say his rampage killed a dozen and wounded 38 at the Century 16 theater in Aurora, about 10 miles east of downtown Denver.