During the performance of the "Gotta get a gift for Splinter" song, the actor playing Leonardo's genitals are visibly hanging out of his costume.
The costumes are really low quality in this production, and it shows. Visible seams and zippers can be seen on the Turtles' costumes.
Cameraman shadow on all four turtles during one of the songs: Gotta Get A Gift .
During the gift hunt, one of the Turtles sings "Six yellow yo-yos...", but Michelangelo is clearly holding only five of them.
Michelangelo proudly displays the framed pizza when Splinter sings about it, and even points to himself every time it's referred to. However, it was Donatello's idea to get it in the first place.