HAHA, same exact thing happened to me a few weeks ago. I guess I unlocked my car a wierd way by not turning the key as far as it could go. Then suddenly an alarm went off! I was like WTF?!??! I frantically looked around to see if it was someone elses car, nope it was my SSE. It took me awhile to figure out how to turn it off.

Glad to know I wasn't they only one...I mean I knew I had an alarm...just never heard it before...