I can't change the setting now...
Anyway, the scene has the protagonist about to leave the building when he sees a multitude of creatures from afar. He runs back in to get a gun from his suitcase and is promptly attacked in the lobby. Eventually, he ends it by stabbing it with a homemade grenade with a knife attached. It explodes, taking out the lobby.
I'm getting stills to show right now. One, a still of me in the mask, no lighting, just to see how it looks. Two, the lobby in normal light.