Is There a Fire At my House?

I was on my way home from work a few days ago. Anthony was probably about five minutes behind me. So I pull up into my garage and let the door down. I unlock the door to the house and begin to disarm my alarm. My hand slips and I accidentally hit the fire button. I immediately cancel it and finish disarming the alarm. I call Anthony and say, "Hey I hit the fire button but canceled it. Everything should be OK....right" He says yeah, but I'll call the alarm company to verify. Thirty seconds later he calls back and says that all is well..he's also driving into the driveway by this time. He said that the fire signal did reach the alarm company and they were in process of dispatching a fire engine. All is well now. It's been a total of three to four minutes by now. We both begin to walk in the house and settle down to watch the evening news. The news starts, but in the distance we begin to hear the unmistakable whir of a FIRE TRUCK. We open the front door and what do we find. A big, shiny, red fire truck sitting out front. Apparently they got the cancellation signal just as they drove up! We weren't billed for this because it was our first "offense." So I'll have to be more careful!!