If you drive around enough in an old junker International, you are likely to get honked at from time to time. Let’s face it these trucks are pretty slow. Instead of nudging the plastic bumper of the offending honker, why not wait until the next red light and lay on your 12 volt air horn.
Why is everyone in such a hurry anyway? After speeding past me and honking, you will likely end up right in front of me at the next red light. Your Prius might be faster, but my Travelette sounds like an Amtrak train when I honk back!
International Harvester 1100C Travelette Pickup with air horn