The signal from your brain that tells your muscles to squeeze *is* electricity. When you squeeze all the muscles in your arm, your hand closes tightly.
So when you’re electrocuted, all your muscles are just getting the SQUEEZE signal from all that electricity, louder than your brain has ever sent it before. So your muscles squeeze like crazy, locking your hand closed.
And if you try to let go, your brain’s own weak electric signal saying “let go” is WAY weaker than the electric jolt yelling SQUEEZE. So you squeeze.
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