I have no idea either, okay.
I was bored and decided to experiment a bit, so I made this. Instead of doing a regular vector, I tried making a solid black, thin lineart and do things a bit different than I usually do. Pose is based off Rainbow Dash's from "A Dog and Pony Show", but since it was an experiment, I tried to use the reference as little as possible. In effect, we have...this. I'm going to torment poor Blackjack further and experiment more on this piece with things like shading etc. Because of that, this is mostly a WIP, as you can see from the fact she doesn't even have a cutie mark yet. Though she kind of DOES look like a filly here, doesn't she.