Fire alarms

What is it that may ruin an otherwise pleasant evening? Perhaps it is a fire alarm? Yes, that would do, but ruin it completely? No. What would ruin it completely would be a second fire alarm about 20 minutes later. And since we need to leave the building at every alarm that is piercingly loud it was a nice experience to be welcomed here with the sound as peaceful as dying buffaloes and giraffes in horribly painful labour.