Like someone doing a spot-on celebrity impression, even the best parodies are, at their very core, marvels of the derivative. Still, there’s something mesmerizing about a well-tuned riff on a zeitgeisty moment. It’s almost primal. Anna Roisman and Cannibal Milkshake don’t reinvent the skate here by any means, but they don’t have to. Their ear for tone and their tenacity in pursuit of I, Tonya homage shouldn’t be missed, both because it’s funny and–more so–because it does the movie justice, whether you liked it or not.