Excellent video!

I think I would pretty much do the same thing, except with my weapon.
I would try to remove(run) myself and others immediately around me if possible. There is no reason to get into a gun fight if I don't have to!
If I can't get out I would try to take cover(hide) in an area that created a funnel for the gunman to approach.
If I have no where to hide I would still try to find a place where I could ambush(fight) the shooter.
I can't see many good endings to wondering about the facility with my gun drawn hunting the "bad guy(s)".

The company that I work for does not allow employees to carry firearms. My question is, would you defy company policy and carry anyway?

I agree completely @jdj! I've carried to jobs that didn't allow it. The chances are that you'l never need it, but if for some reason you do, you can always get another job.

Well I won't lie, if the company forbids it I would not carry!
I made the post above to tell how I might change things IF I had my gun and show how they might not be that much different.
The thing is if you are caught carring after legal notification it is a misdemeanor! Now some may say "I will risk the charge to be able to defend myself".
That is your prerogative.