[ninenot]

and the three pieces of brass hit the floor.

Interesting. Commercial-grade floors are either concrete or very thick wood over steel supports.

Did they also hear the mice taking a crap?

[Shooter 2.5]

I've been in commercial buildings such as that. You could see the lower floor from the cracks in the flooring.

You are correct as far as how thick the planking is, though.

What I left out was they described the dust falling on their heads with each shot.