Sheldon the Evil Turtle cuts the head off Stewie's teddy bear Rupert and sends it to Stewie in a box. Later in the episode we see Rupert all in one piece again in Stewie's crib, with no suggestion he's had his head cut off and then sewn back on again.
When Lois meets Justin in his back stage dressing room, Lois's arm is visually detached from her body as you see her in his mirror.