Several times my UFO beeped and locked the car while in the garage, I though maybe the key fob button stuck out too far and somehow I activated the lock button. Once I left the car in the garage, with the widows down, and the thing activated the alarm. The next morning at 05:30 I tried the door it would not open, so I reached inside and opened the door. Well I found out the alarm work very good and loud. I also found out you cannot turn off the alarm with the key fob. I had to start the car before the alarm went off. I probably woke up several late riser neighbors.
Last weekend I was working in the yard and UFO beeped, lights flashed for more than the normal 3 times, I did not have the key with me so I had to run in the house to get the keys, by the time I got back to UFO, the beeping and flashing had stopped. Since I live near an airport, I thought maybe a stray radio or radar signal has set the the alarm. I have had UFO 6 months and I am still being amazed with it's gimmicks and quirks.