Plot hole: When Jason is going next door to chase after Trish, he pulls Jimbo's body down from the doorway and begins walking towards Trish's cabin. He is seen walking by himself. However in the next scene, he throws Rob's body through the window. There was no time for him to go back and get the body.
Plot hole: When Jason first wakes up in the morgue, he kills two hospital employees inside the hospital (a semi-public place) and leaves them there. Later in the movie, Rob Dyer (the hitchhiker)in trying to convince Trish Jarvis that Jason Voorhees is still alive, he says that two hospital employees disappeared. Their bodies were not discovered in the middle of a hospital?