Just once, but then I quickly explained about how I had had my bicycle stolen from one top of my car (along with my Thule roof rack) while I had run inside to find the key to lock said thule rack. My house at that time was right next to a big apartment complexes parking lot... I still fume over it... $1200 gone just like that. So now I go completely overboard. Who would have thought Iowa would have such a bike theft problem. Grrrrrrr, it's been five years and I'm still VERY bitter.