A childhood belief about drugs

When I was very young, my sisters let me watch a modernized version (70's) of Frankenstein. There was a scene in which a man heard a knocking at the door and when he opened it, a disembodied hand fell out and started crawling towards him. From then on, that hand was under my bed and was gonna grab me if I stood next to it. I also thought that burglars were going to try to poke me with drug-filled needles and the only way to stop them was to keep the covers up to my chin, cause in my young mind, I didn't know how syringes worked and I thought that the covers would wipe off any poison before the needle reached me.