The Car Alarm

Have you ever walked by a car to have the alarm start going off like crazy and you are the only person that is by it? I hadn't until today at Wal-mart. What do you do? I looked around to see if somebody was playing a joke and I didn't see anyone for awhile. So, I meandered back to my own car to see a lady walking very briskly back to her car that had gone off. She was glaring at me as if I kicked her car or something to make the alarm sound. I just got in my car and left.