The Q or the Que / Cue? move?

Does anyone know what this move is or a video I can look at to see / practice? I learned it at the studio the other night- but def want to study it some more before doing at home w out a spotter. It statrted inverting up in to a cupid (i think!)  You hold your foot (shoe)  and then while holiding drop your lower body down so that you can regrip into pencil. It was really cool but I havent seen it anywhere before or after and I am dying to learn and watch! Any tips. suggestions, links would be greatly appreciated! :)