When the boy who wanted to be a wizard is being chased in his dream, they are in a dark tight corridor, and Freddy releases a chair with spikes on it to chase after the boy, but if you look you can clearly see the chair is being pulled with strings.
During Joey's nightmare, he is seduced by a topless nurse who then captures him before turning into Freddy. As originally conceived, only her face was going to transform at first, thus having Freddy's burnt male head on top of an otherwise perfect topless female body in order to create an eerie, otherworldly look. The actress portraying the nurse even took part in some test shots and performed the scene under heavy prosthetics to make her face look exactly like Freddy's. However, the effect was cut as the crew felt it looked far too weird, and that it diminished the moment when Freddy fully appears on-camera in the scene.