Or, do. By all means. The St Patty's day parade is going on a half block away--we can hear the whooping of sirens. You may ask, how do you tell the difference between happy-parade-sirens and normal-everyday-i'm-sick-of-city-living sirens? I'm not sure. Perhaps it's that these tend to be short little bursts rather than all-out.
Or maybe it's because Ms J heard the bagpipes and we are smaht deductive thinkers.