Let's go through it.
John McClane is your Mantra. He's basically unstoppable, and given enough time, he can stop any amount of bad guys no matter how badly he seems to be outnumbered. He seems ordinary enough, but he never ceases to impress no matter how much time goes by (or in our case movies get released). When you sit to meditate, your Mantra goes to work on your mind, intellect, body, emotions, everything and just Yippee Kayai's the bad guys into oblivion.
The scared people in the building are like the body-mind. They're held scared by the big threats of Hans Gruber and his minions (the ego complex). If they all rushed and fought, a few would go down, but they'd crush the bad guys. But that's super scary -- few of us have the courage to just be ourselves all the time. I know I've struggled with that.
So where does that leave you? Well if you ask me, you are Reginald VelJohnson -- you know that older cop that calls John McClane from the outside. He's the witness of all the drama that's happening, and while he's not directly affected by it, he can't rest until the day is saved.
What do we have to do?
It might be a little scary, we might have to deal with resistance from the police force for employing a renegade (family, friends, work, cravings, aversions, desires), but all we have to do is make a little leap when appropriate, and call John up. IE sit to meditate.
From the little effort, day in and day out, in time, the bad guys are certain to fall. And when it finally goes down, it's going to be super dramatic and awesome and everyone will be crying tears of joy.