Reason why I LOL'd a lot when I heard Witty is a bank teller is a fact that tellers here, at my bank, are the ones who think/talk/discuss/analise/everythiong-else finance and economy on any level.
They are so hyped about working in a bank thinking that they will become CEO in future years and run large companies or such. Longer you work, less you care about all that.
So witty, you're a text book example!