system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why when we are in a car accident for example, we tense our muscles, when in reality keeping your body loose will cause less damage?
gpt
Its a natural survival instinct, for example, thousands of years ago if a person was confronted with a tiger we would tense up, this is due to the adrenaline and allows the body to move faster because the tensed muscles hold more energy.