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HOIf a car goes underwater, the metal prongs on a headrest can be used as a tool because they’re strong enough to apply focused pressure to a side window. Car side windows are designed to shatter more easily than the windshield, which is laminated and much harder to break. Using leverage instead of blunt force makes it more effective in emergencies.
This works because pressure changes and panic can make it hard to use raw strength. The headrest turns a common object into a mechanical advantage, increasing your chances of breaking the glass if other escape tools aren’t available. Knowing this ahead of time matters, because in emergencies, having a simple plan can make a critical difference.
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