Revealing mistake: When Vera and Merill are talking to the squirrel lady, whenever you can see the ground behind the squirrel lady, near one of the cages, you can see a squirrel that is obviously fake. It is not moving at all and looks like it is carved from wood.
Revealing mistake: At the end whenever we see a shot of the large crowd from the stage point of view look closely.You can see how the image of the crowd has been tiled because people are transparent. They must have filmed a small section of the crowd then duplicated it to make it appear that there are thousands of people there.
Revealing mistake: When Blaine is getting Duane to put the money in the bag, you can see at one point he tries to stop himself from laughing. This is because on the special features of the DVD there is a 6 minute long outtake where they both keep laughing on this take.