Have you ever noticed the way in which people read weighty and confidential-looking business documents on the tube, in full view of other tube-goers? Is this:

a) because they're very important?
b) because they're very busy?
c) because they're stupid enough to think that we think that because they're reading weighty and confidential-looking business documents that means they're very important and very busy?

We don't care! Stop working, read Metro for heaven's sake.