Warning sign in the elevator

Attention! Carrying a garbage can around can get pretty nasty in here.

Fascination Elevator buttons

Elevator buttons keep catching my attention. Although it seems such an easy task to design buttons for going up and down, I encounter so many variations of solutions. Here is one I found in Lisbon, Portugal. I wonder what people expect when pushing "01".

What does S an U stand for?

salt and pepper shaker

In this video Don Norman talks about complexity. At minute 1:15 of the video he talks about salt and pepper shakers.

In real life, things sometimes turn out to be used in a different way than the designer intended. 

Another restaurant, similar problem...