Mr.O'Brien always seemed like an average everyday school teacher but, when he wasn't at school, he was an undercover secret agent for the government. Everyday at 5:30 in the morning, he turns off his alarm clock, accidentally hitting the snooze button. He then gets out of bed, walking over to his walk-in closet to pick out a suit for this mission and his sunglasses. He quickly showers, making sure to wash his hair twice. Then he throws on his clothes and goes, counting every step as he goes to his Volvo to make sure they are even.

He starts to think about this dangerous mission. Could I die, he starts to think to himself. If so, it's the risk that I have to take. Sitting down in the driver's seat and starting the car, the seatbelt automatically goes into place. After hearing the click, he drives about 15 miles down the road to the movie theatre. There is a gunman inside and he has to take him down before he shoots anybody. He makes his way inside and pays for a ticket to Zootopia. He goes inside and takes a seat in the back.

He keeps an eye on the gunman from there. He gets ready to jump up and shoot the man every time he shifts in his seat. About half way through the movie, the first shot goes out but he does it towards the ceiling first. Then Mr. O'Brien gets up and is about to shoot the gunman when a second gunman appears out of nowhere and shoots Mr. O'Brien, killing him on the spot.

"It was the risk I had to take," were his last words before he died.