Batman US cinema shooting: 12 dead in Colorado
"I saw a man walk in through the exit," a witness told a reporter from 9NEWS in Colorado, saying he threw what appeared to be a pair of gas canisters to the ground. "He waited for both the bombs to explode before he did anything. Then, after both of them exploded, he began to shoot."
Jacob told his mom that he saw a guy walk into the theater wearing body armor and throw some sort of cannister that then emitted some sort of gas.