This is about the only real physical action in the entire novel, with Nick defending himself and Camilla (and Asmedogh) from the excesses of the pushy Homeland Security agents. Kind of a hell of a culmination to their great artistic triumph earlier in the evening.
It's not all that unrealistic. Law enforcement representatives don't care much to have their efforts flouted by those they conceive to be the "bad guys," and have been known to react pretty vigorously to such things. It's unfortunate but understandable. And, for reasons Nick addressed much earlier, even though they're not actually breaking any laws, Nick and Camilla do indeed have something they don't wish to have revealed. Amd they're prepared to go to some lengths to prevent that from happening, as the rest of my story will show.
We're now back away from the world of operatic performance and into the science fiction side of my tale once again.