In a building at the Johnson Space Center, an employee got in with a gun.

If it were your office, what would you do?   

“There is an instinct to hide which is OK, as long as you are picking a good hiding place,” safety expert Bob Stuber said.

By having 11 News simulate an office attack, Safe Escape creator Stuber shows the things he says can increase your chances of surviving, and the things that hurt your chance.

“People have a tendency to jump under the desk, but when a shooter comes by [and] sees the phone and wire, it’s a waste of time,” Stuber said.

Finding a hiding place may sound like the game you played as a kid, but Stuber said if you do it right, it can save your life.

“In a case like this, it’s not so much about finding a steel wall to hide behind,” Stuber said. “[She] disappeared behind floor length curtains.”

Like his advice in schools, Stuber said the bathroom is off limits.

It will do nothing but leave you cornered.

Sometimes desperate situations he says require desperate acts. He said if you are close to an exit, just get out.

“By pulling those blinders up, those blinds, and taking a chair or any computer terminal and put it right through the window,” Stuber said.

The best advice he says is to rehearse in your mind what you would do if shooting breaks out at the office before it happens.

“It’s a matter of situational awareness, understanding what you have to work with,” Stuber said. “Every building is different; every situation is different.”