Today at work I get this email.
Subject: Alert !!!!!! <-yes six exclamation points.
ALERT <-in size 40 type
Due to the sun beating on the metal door it expands sometimes putting pressure on the latch throughout the day and evening. You may need to scan your cards then push on the handle to release pressure from the latch then pull and it should open.
I think the author was a little too excited about the sticky door.