If you count mass homicide, then yes... every single day when trying to get on/off public transportation. People cram and push trying to get in, to the point where they are physically stopping the people who need to get off from doing so. When did people suddenly forget how to form a queue and does no one ever stop to think, maybe if I'm not blocking the exit people will be able to get out faster, so I in turn can get on faster, thus making the whole process go faster and with less pushing.