(Inside the printing room of the school library. Two schoolmates bump into each other. They known each other due to some common classes last term - they're not close friends... more like acquaintances.)
Guy: Hey!
Girl: Oh hello!
Guy: So whatcha doing right now?
Girl, inside her head: I'm fucking in the printing room - what do you think I'm gonna do here? Baking cupcakes? What an idiot.
Girl: Oh, I'm photocopying some textbooks... so what are you doing here?
Guy: I'm printing some stuff too.
Girl, inside her head: Oh shit.
The above scenario could take place anywhere in school - in the lift (not so bad), at the canteen (quite bad) or in the toilet (worst case). I'm sure most of us (myself included) have been in both shoes before and this usually happens instinctively when you're trying to engage in some polite small talk.
Lets do each other a favour and cut down on such 'blond' moments. A simple 'How is your day?' would be perfectly fine.