This is where, after forgetting my bike was on the roof after a long ride, I ran straight into my garage. My car's rain gutters were ripped off the roof of my Honda, and I got away with ONLY replacing the car and the garage door!! (My bike was oddly enough - ok.)  I sat down and designed the first iteration of the reusable, removable, window bike roof rack warning that we sell today, and the rest is history! We have what you need - a colorful, friendly reminder that your bike is on the rack!