Alright, this should do it. I am a comedy fan, so I am goofy, Weird Al fan, you get the idea. My parental units have a 2008 Dodge Ram 1500 4x4. I got to thinking about how often people do not pay attention to things, so I put that to the test. I took a plastic Hohner diatonic harmonica in the key of C and zip tied it to the radiator of the truck. Truck driving down the road "what's that whistling noise"? I left the harmonica there for a week. Great fun and they never figured it out.