If you could be invisible for a day what would you do and why?

Well, the first thing you might do is robbing a BANK, I'm sure you will, but let's rethink of it ! I'm invisible and I can easily know the hidden secrets of this world , right ?

I really want to discover who rules the world, how THEY control us, what they really think of us.. are we only like pets who's been manipulated all those years ..

What would you do ?