death on the tube

in this modern world of daily threats, many people have taken to finding other ways of travelling which don’t require you to be squashed in to a little metal tube in a tunnel way under the city.
of course, it’s still one of the most efficient ways of getting round town so people still use it.
it’s against this climate of fear that i was interested to see a sign which reminded people of the possibility of death on the underground (if they open the door which links carriages)
Death is something we don’t generally talk about but it’s worth considering as there’s a 100% chance it will happen to you (and me). But i’d still rather not have a sign with death written on it whilst travelling !