The crucifix burn comes from Phasmophobia, the cooperative ghost-hunting game where players use a crucifix to stop a ghost from hunting. When the ghost tries to hunt near the item, the crucifix ignites and burns away, producing the game's warning cue. Clips of the sound spread through gameplay videos, horror edits and stream highlights, where creators use it as a danger alarm for ghost hunters and as a cue before a jump scare. It remains popular because it instantly signals danger to anyone who has played the game.