The boing is a classic stock cartoon effect for springs and elastic objects, long reused in animation before it spread online as a meme sound. On gaming boards like 4chan's /v/ and in Team Fortress 2 videos, it became shorthand for goofy physics and failed jumps. Short clips like this one are shared on soundboards alongside other slapstick hits like the doge bonk, because a single twang instantly signals a joke without any dialogue or explanation needed for the viewer to get it.