Phew, this kick took a while.
The first striker art was Fluttershy doing a flip kick. She's doing a flip again as a sort of tribute to the original. Also, it's pretty tough trying to come up with unique poses for six hind leg kicks, so some sort of flip was inevitable.
She doesn't have her hair tied up like the original. I thought it would be funny to show Fluttershy combating the massive inertia of her mane while simultaneously trying to kick a ball.
Edit; changed the trail slightly
So, the thumbnail is now permanently horribly mangled. even if I try to upload the original picture it stays completely messed up. Just wonderful.