An episode full of that. We need a Celestia and Luna episode.
If there's ONE gripe I have with Slice of Life, it would be that I felt they were a bit too heavy on the Doctor Who references. He took up entirely too much screen time, and the "ALLONS-Y" line is what broke the camel's back for me. There's references, then there's blatant crap like that where non-fans are left confused.