We don't have a roof rack, but a trunk rack. One time we came home from a race and I didn't pull the car far enough into the garage. I hit the garage button and the door came down and was squishing DH's aerobars, smooshing his bike. He yelled at me, so I hit the "up" button, but hit it too frantically and then it went up and back down.
Didn't do any damage, but he was M*A*D!

He was so mad at me... we are NOT newlyweds, so there was no sweetness there... took him half a day to speak to me again. C'est la vie!