The Muppets (2011)

Revealing mistake: During the opening musical number, right before Gary joins the large group of people for the dance, he accidentally kicks Walter out of frame. Watch closely though. His foot comes nowhere near Walter when he supposedly "kicks" him.

Statler: Is this movie in 3-D?
Waldorf: Nope! The Muppets are as one-dimensional as they've always been!

Trivia: Due to pacing reasons, the backstory of the villain Tex Richman had to be cut. As originally conceived, when he was a child, his parents hired the Muppets as entertainment for one of his birthdays. However, during their routine, he discovered to his horror that he simply didn't have the ability to laugh like all of the other children, making him feel different from everyone else, and causing him to become an outcast when other children began making fun of his inability to laugh. He blames the Muppets for revealing this part of his personality to the world, and causing him to be ostracized as a child. This explains why he says the words "maniacal laugh", as he simply cannot really laugh. This also would prove that the Muppets eventually "saved" him during the credits scene where Gonzo accidentally hits him with a bowling ball, causing him minor head trauma that finally makes him able to laugh.