In case of fire, do not use elevator.

One day I was in the elevator in the Central Train Station of Amsterdam, moving from one university building to the other.

In the elevator there was a sign which said: In case of fire, do not use elevator. 

Under this sentence there was written something which really made me think. (and laugh). I made a picture and when I came to my class, I showed the picture, without the written part, and asked the students: " what do you think was written under this sign, it starts with : use......."?

They came up with different solutions: "use the stairs, use the fire-exit, use your mobile to call the fire-department, use the fire extinguisher, use the intercom " where some of them.

I showed them the picture, and everybody was laughing. 

This is a basic, logic form of thinking we forgot: thinking in solutions which fit the problem. 

Because of all the information we get, everyday, we forget the most obvious, simple and most pragmatic solutions. Think about it.