There’s a serious usability problem with the doors at the humanities building at Cardiff University. Let me describe them to you. On one side they have a handle, and on the other side a sticker saying something about safe exits or so. So which way do they open? Well, quite naturally, if they have a handle, you have to pull, and if not, push.

Except for one door. After months and months or passing through those doors to get to the computer room (and believe me when I say that not many things motivate me like an Internet connection), I still have to make a mental effort to remember that the first door is to be pushed and not pulled open, even though it has a handle.

Irritating.