Bajon de tension is a Spanish expression for a sudden drop in voltage or blood pressure, and online it became shorthand for any abrupt collapse in energy. Short soundboard clips using the phrase spread through meme edits and reaction videos, where creators reuse it whenever a person, machine or plan abruptly shuts down. Its appeal is its clarity: even viewers who do not speak Spanish understand the drop from context and timing. That has kept it in rotation as a compact reaction sound for fails, exhaustion jokes and fake blackouts.