Laurie really deserves more credit for this film. She not only stands up to a terrifying psychotic killer, she manages to stab him in the gut with his own knife and with a coat hanger in his freakin' eye! And even then it's awesome for Myers who manages to survive both and the above mentioned shooting.
To top it off, Laurie does it all not to save herself but to save the kids. When she finds her friends' bodies she immediately heads to the children and sends them to safety, fending off Michael the whole time. It's only when the kids are safe that she slips up and Michael almost kills her. Whatever the Doyles were paying her is not enough.
This famous quote on how messed up Michael is from Loomis' perspective:
Loomis: "I met him, fifteen years ago; I was told there was nothing left; no reason, no conscience, no understanding; and even the most rudimentary sense of life or death, of good or evil, right or wrong. I met this six-year-old child, with this blank, pale, emotionless face, and the blackest eyes...the devil's eyes. I spent eight years trying to reach him, and then another seven trying to keep him locked up because I realized that what was living behind that boy's eyes was purely and simply...evil."