Yes. This is a reference. Anyone who hasn't seen Back to the Future needs to watch it. Now. Seriously, go watch it. It's awesome.
Tia and Luna are probably gaping at a time traveling Dolorian from an alternate dimension with Marty and Doc inside. Yup. Someone needs to write a fanfic.
Anyhow, the idea for this pic popped up in my head one night so I drew it on paper, scanned it, vectored it in Illustrator, and shaded it in Photoshop. :3
For those who don't get the reference, here is a musical remix of Great Scott and This is Heavy: [link]
Yeah, Doc! They're talking unicorns... with WINGS!
Truly ASTOUNDING! They must be the progeny of some unicorn female and the mythological Pegasus of Greek mythology. Their being able to speak must be the result of thousands of years of sentient evolution!
Lyra! Please, let go of the human. Now. But ... humans. They have hands ... You can look at his hands another time, dear. Right now, they seem to be very busy.