20 Things You Didn't Know About Halloween (1978)
3. Michael Myers Is Not Actually Disfigured
According to John Carpenter, fans of the film often tell him how shocked they are to (briefly) see the disfigured Michael Myers revealed towards the end of the film.
As audiences will recall, The Shape is throttling Laurie Strode on the landing at the Doyle residence when Dr. Loomis rushes upstairs. Laurie manages to fend The Shape off for a moment by pulling off his mask, revealing the 21-year-old Michael Myers.
Carpenter considers it to be a great example of the power of suggestion in films that audiences see a disfigured Michael Myers (portrayed by Tony Moran) in this scene because, in truth, what they are actually seeing is a handsome young man with an injured left eye from where Laurie thrust a coat hanger into his mask; he is not actually disfigured at all.