Ok today Im at the nursing home visiting my great uncle and I bump the mirror of the hyundai next to me and the car alarm on it goes off just for one sec then off, scared the you know what out of me. Who makes them? Do you think its annoying?

 

its a dual stage shock sensor, if you just bump it it goes off for a sec to let you know that the car is alarmed.. i think its a neat feature, unless they crank the sensitivity way up.. pretty much any alarm either uses this feature or can be upgraded to take advantage of it