Loomis didn't hear Laurie Strodes screaming??

Perhaps he did hear her screaming but couldn't tell where it was coming from. Only when he saw the kids come running out did he know he was in the right place.

Too bad our old "expert" isn't around to answer this question. He would have had a field day telling us how it nearly ruins the movie for him. I watched it yesterday and had a chuckle at the part where Brackett says the dog is still warm as well as the part where the laundry room door opens and shuts on Annie.