Nathan smiles at Kate and Bren's immediate willingness to help out - no questions, no complaints - and grabs a broom to sweep up the worst of the broken glass.
For the next little while, it's quiet as everyone does the best they can to get some of the surface damage erased. There's no way they can do anything about the major problems, not on their own, but taking the time to clean up a little bit now gives the dust time to settle outside. Before he has to send everyone home, hopefully safely.
When everything's as good as they can make it for the night, he calls a halt and reaches for a bottle of booze. "Come on, everybody. Let's have a drink and call it a night."