I saw a movie when I was a child (late 90s, early 2000s, but movie might be 80s or 90s)
The movie is about a metallic (or other rigid material) glove that lives on its own. There is a scene with a boy under his bed sheet with his dinosaur plushie and at some point that plushie gets sliced up.
There is another scene where said glove lies on the backseat of a car and a man is driving it. I don't know whether the glove manages to kill the driver.
There is a movie with Michael Caine where he loses his hand but I am quite certain the hand is artificial.