She's got legs, she knows how to baffle you

Every now and then, Julie feels the need to explain away her little moments of brilliance.
Unfortunately, Julie being Julie, most of her explanations end up as Gems in their own right...

I'll be honest here. I've tried to work that one out a few times and I'm sat here now at nearly midnight and what's left of my conscious brain is saying 'No! Don't look at the nasty thing! You want to sleep!'