Just random enough

Have you ever noticed that when the low battery alert goes off on the smoke alarm that it's just random enough.

You stop for a few seconds to say "Hey, did I just hear that?" then by the time you convince yourself that you didn't hear it and you go on with life....you hear it again.

But by then you've moved so then you're like "Oh yeah, I DID hear that, now where did it come from?" Then the game begins but just about the time that you lose interest in the game, it beeps sucking you right back into it!.

One time it took me 30 minutes to figure out where the beeping was coming from.  Turned out it was an empty apartment on the third floor and the alarm echoed through the hallway.