Fire!?

On Friday night we came come at night and found that the smoke alarms were going off in our neighbor's condo. (They weren't home) It didn't look like the place was on fire, but we couldn't really see anything since it was night, the lights were off and the blinds closed, so we called the fire department on their business line to ask whether it was an emergency. They told us to call 911. Anyway, long story short: they said they would send some over to check it out. We were expecting one guy to come over in a car, but after an ambulance and fire truck arrived and woke all of the neighbors, the firemen scaled the balcony, broke in through their sliding door and discovered that their smoke alarms were just malfunctioning. False alarm! Oh well, better safe than sorry!