Ya, that happened to me once. I cannot remember what I was doing, but I hit unlock twice... opened the hatch and off the alarm went. You have to hit the panic button to turn it off... But only did that once.

HOWEVER, my alarm goes off for no reason sometimes. I live in an apartment and my car is in view of my door... I have to keep stepping out to hit the panic button to turn it off. Sometimes it does it very common (few times a day), but has not done it in awhile...