There’s security cam footage of a guy in San Francisco walking onto the subway tracks and then lying down. But what happened next is why it’s going viral.
Some people waiting on the platform jumped onto the tracks and started lifting him to safety. And some other passengers ran along the platform waving their arms to get an oncoming train to stop.
(Here’s the security cam footage of him jumping onto the tracks. It’s at 1:26 at the top of the screen.)