in reply to Ondřej Caletka

This is very normal... 🤔

The typical situation at a subway train door is like that:
1) I want to get on, but standing outside the door profile to allow passengers to leave the car (I see some persons just behind the door).
2) Several seconds passed and the door remains closed. Thus I go to it and press the button.
3) The door opens, I make one step ... and collide with the passengers running out between the ones standing inside close the door (and not leaving the car).
🙈