When Ash is possessed of the evil presence and beats up the girl, he throws her on the couch and chuckles evilly (or hornily, same dif). He is stopped from committing further molestation by the sight of that ugly piece of jewelry that he gave to Linda earlier. When the necklace gets a closeup, the chain forms the outline of a skull.
This film is actually still the center of a massive fan-controversy. The opening scene re-caps the events of the first film, but changes some major details, causing many fans feel this is a "remake" of "The Evil Dead", not a sequel. In fact this film is a sequel, the footage had to be altered for legal reasons, after footage from the first film could not be obtained, and then again for time reasons, because the recap would be too long if it included all the major events from the first film. However, despite director Sam Raimi and actor Bruce Campbell explaining several times that this is a sequel (including in the DVD commentary for the third film), and the fact that the end credits refer to the film as being the sequel to "Evil Dead", some fans still feel it is a remake.
The beginning of this film is a recap of the events of the first installment. However, all of the footage is newly shot, and completely rewrites the preceding events in order to suit the direction the writers wanted to take this script. There are many changes. Three characters completely disappear from the story, the Book of the Dead is given a new name (It was not called the Necronomicon in the first movie), the bridge is much sturdier in appearance, and the book is not destroyed in the fireplace.