Most of us fans know that the original script for Friday The 13th Part III differs greatly from what actually made it to the film. The original script contained a lot more scenes, longer sequences and more character development than we got in the end. Scenes like a car and motorcycle chase with the bikers and a scene where Chris and Rick speak about someone (Jason?) sleeping in her bed and rummaging through her belongings. Here's the original script excerpt for the scene where Shelly fakes his own death. This scene was written to be a lot longer with more scares.
INT. HALLWAY - DAY He walks to his room at the far end of the corridor and pushes on the door to open it. It doesn't budge. Leading with his shoulder, he bashes into the door. This time it gives. Shelly stumbles off-balance into the room (this is the same room which looks directly down on the outhouse)! A HIGH-PITCHED FOREBODING NOTE enters the SOUNDTRACK... Shelly takes a long look back down the hallway as he closes the door. CAMERA HOLDS for a moment on the closed door as the MUSICAL NOTE INTENSIFIES... CUT TO: EXT. LAKE / COTTAGE - DAY A chilling, bloodcurdling SCREAM, from inside the house, shatters the calm by the lake. DEBBIE What was that? ANDY (looking around at the others) Where's Shelly? VERA I haven't seen him. DEREK (taking control) Come on!... He leads the others in a race towards the house and up the porch steps. CUT TO: INT. HOUSE - DAY The group barrels into the house and assembles in the living room at the base of the stairs. DEREK (calling out) Shelly! Where are you?! CHRIS (shouting up the stairs) Are you all right, Shelly? Silence. DEREK Let's spread out and check all the rooms. Outside, too. (to Chris) You stay with me. CHRIS No. I can look around by myself. I'll take the upstairs. The group disperses. The CAMERA STAYS with Chris. She heads up the spiral staircase to the second-floor landing. INT. SECOND FLOOR HALLWAY She looks both ways down the corridor and sees Shelly's closed bedroom door at the end of the hall. She approaches, tries the knob and pushes. The door is stuck. She kicks it open with her foot. The door slams against the wall of the room. CHRIS (before going in) Shelly...? The room is in order. Chris takes a few hesitant steps inside, looking all around. There's no trace of him. There are two closets in the room. Chris reaches out for the nearest one and pulls open the door. MUSICAL STINGER... SHELLY An axe imbedded in his head, and bleeding profusely, falls forward into Chris' arms. She SHRIEKS as Shelly's lifeless body slides down her arm and slumps to the floor. Chris recoils, SCREAMING in horror. DEREK AND VERA burst into the room. CHRIS (sobbing) He's dead... he's dead... VERA Oh, my God! DEREK (grabbing Chris and turning her away) Don't look! Let's just get the hell out of here. Andy and Debbie, followed by Chili and Chuck, rush into the room. They react accordingly, except Andy. He is curiously unaffected by the gruesome sight. He bends down over Shelly. DEBBIE Don't touch him! Undaunted, Andy places his hand on Shelly's stomach... and tickles him. Shelly springs to life, giggling uncontrollably. The others gasp incredulously. ANDY Get up, you creep. Shelly looks up at the angry mob. SHELLY (a little worried) I guess I fooled you, huh?