Why do sleep deprived people fall asleep in public transport so easily?
Why is it that people fall asleep all the time in metro and the bus? It mostly happens to sitting passengers, but I've also seen people fall asleep while they're standing as well. This doesn't happen in other places, like when people walk in the streets, or at the work, or at the hospital etc. Same applies to me as well - it's like a sleeping spell is applied to me if I'm riding in public transport while sleep deprived.