I saw the movie at the ERT, our Emergency Response Team, meeting just yesterday (we do HAZMAT not SWAT!)
Funny thing was the nutjob on the movie open the door to the building and what was on the door? The TEXAS 30.06 sign! Yes 'no concealed handguns allowed'.
I almost died laughing as I pointed out to the other guys (and gals) it was a 'gun free' zone!
Now about that baseball bat. Came to the conclusion one needs to find a makeshift bat NOW, while nothing is happening, and know how to get a hold of it. Be it a mop handle, leg of a table, old rusty pipe, OR BIG WRENCH kept in the cleaning closet (you might even get away with putting such a pipe in it now, before anything happens...)
And then find some bait.
Bait you say? Well a fellow co-worker that would look like a good target for the nutjob and use them to attract the nut toward the corder of the hall you are hiding behind!
Cold it is... but come-along games have been used throughout history to ambush stronger enemies.
"The government has confiscated all of our rights and is selling them back to us in the form of permits."