LOL, I almost gave this pet peeve alone a thread by itself, because I've never had it happen, until today:
I walked out of the grocery store, and headed to my car.
I passed a large SUV. For a second, I thought I heart a "thunk" or "thump" or something...then the back door (on the trunk) began to open-I'm not even kidding. It started to flip all the way up. I must have jumped a foot, because there was no one near the car. I must have looked pretty silly!
The car's owner had just come out of the store was was using her key chain to push the magic button that opens the trunk from a distance (apparently, a very long distance, lol).
My first thought was, "Look before you push the button!"
My second thought was, "I want a car with an automatic door opener that flips open the back door!"