When April changes into a school girl's outfit to distract Dr. Stockman's assistant, she grabs a miniskirt and ties it around the skirt that she's already wearing. But we never see her take this particular skirt off. It just magically disappears. She is also wearing pantyhose which suddenly changes to over the knee stockings.
When Casey is looking at Rocksteady's criminal record, his birthday is listed as 1/28/1978. This is actor Stephen Farrelly's, also known as Sheamus, actual birthday.