One door closes and another opens.

When one door closes, another window opens.

He who opens a school door, closes a prison.

You have to think there's a reason for everything. When a door closes another door opens.

When one door closes another one falls on top of you.

A shot is a lever; it's all it is. You don't open a car door differently each time. A car door is efficient - it opens and closes. So is a shot.