system
Given the following post, respond as if you're commenting on Reddit:
human
What causes people to "stick" to the high-voltage third rail of a railway line?

I've seen it said in many places, including rail operators websites, that if you tread on a third rail you might "stick" to it, meaning the power may have to be turned off before you can be rescued. Is this true and if it is, what causes it?
gpt
You lose control of your muscles due to the high currents, causing intense spasming, you're no longer capable of letting go should you have any grip on it, and you're unable to move if you fall on it.