Because I am an idiot.
I was waiting round in the reception area, there wasnt many people around, thank god, most were in the hall.
Anyway... I was looking at some of the artwork and projects on the wall and noticed one of the names on a rather well drawn pictures was "Mojo"
For my shame I repeated it out loud.
In a fucking DR EVIL voice! 
A woman looked at me.. I just tittered nervously and said Mojo, Austin Powers?
Not the best start to my son's school career!
(Apologies for being in AIBU, I was going to write it as one but once I started typing it came out like this and couldnt be arsed to move it!)