#Callback

A callback is a phantom of the programming world that promises to appear later, only to respond whimsically depending on its environment. The more you rely on it, the more it undermines you, bestowing a fleeting sense of omnipotence the instant it's invoked and then vanishing without a trace once its task is done. Overdependence seeds the infamous callback hell, scattering unresolved mysteries that haunt your debug sessions at midnight. For programmers, it embodies convenience and nightmare in equal measure.