Pig enemies have been central to Angry Birds since the mobile game launched in 2009, created by Rovio as the targets of the slingshot birds. Their popping defeat sound became one of the series most recognisable cues across sequels, spin offs and cartoons. Online, creators lifted the clip to use outside gameplay much like a generic Pop SFX, applying it to any character being eliminated in gaming montages. Its brevity and instantly readable meaning keep it popular for memes long after the original levels.