OK, so it is everyone speeding up or slowing down heart rates at similar parts of the story, not all the listeners synchronizing heartbeats with each other so a

OK, so it is everyone speeding up or slowing down heart rates at similar parts of the story, not all the listeners synchronizing heartbeats with each other so all heartbeats are simultaneous (when I read the headline, I thought it was talking about a phenomena like synchronizing metronomes [1]) [1] https://www.youtube.com/watch?v=T58lGKREubo https://www.youtube.com/watch?v=T58lGKREubo