Truck horns have long been a staple of vehicle sound libraries because the sound is instantly recognisable, even without seeing the vehicle. Online, short horn blasts are reused across meme edits, driving videos, reaction clips and soundboard collections, where a single honk can signal arrival, annoyance or a joke about traffic. Because the clip is so brief, creators often loop it, stack it with other vehicle noises or use it as a transition sting between scenes. Its popularity comes from that simplicity: one loud, familiar sound that needs no explanation to land with viewers.