Well, well, well. I always knew Crayon Pop was no good. Plagiarizing concepts, being ilbe bugs, climbing their way to the top with Bar, Bar, Bar which is just alien code for 666... and now, one of the members pushing Girls' Generation's Sunny in the back? How monstrous!...if it actually did happen. Apparently, Crayon Pop is swept into yet another scandal, this time, with their sunbaes Girls' Generation in which one of the members, Way, was accused of pushing Sunny in the back then posing for the camera like the devilish little fiend she is... or at least what people who are almost legally blind think that she is just because of unfortunate timing.
Don't believe me? Watch the video clip that the director should be taken some blame for since the quality obviously sucks for yourself, where clearly Tiffany pulls Sunny a little bit closer since she's blocking the Crayon Pop girls (hence why both Sunny and Tiffany move up), Yoona looks back at around 0:08 in a direction that looks like it's towards Way as a result of the push, but if you have logical thinking, would obviously know that Yoona would have to back up a little bit more in order to see Way clearly and was probably just looking in that direction as a result of the Tiffany-Sunny pull, the pushee, Sunny doesn't even flinch or look back at the pusher and Way moves her hand up to her face which were previously down because obviously, if you want to make aegyo-filled peace signs by your face you have to first move your hands up towards your face.
Found this comment on the Youtube video: