Yeah, I have no idea if this kind of parody has been done before. If it has been, sorry.
Lyra is so obsessed with becoming human, why not 20% creepier?! The original scene is from the Adventure Time episode Season 3 8A "No One Can Hear You" featuring one of the creepiest scenes on the series: a deer taking it's hooves off and twiddling them.
Original .GIF Here: [link]