It's not in the movie, so probably a deleted/left-out scene. But in the novelization of Halloween 4: The Return Of Micheal Myers. Which I haven't read for a LONG time, and I am not sure where my book is, so I hope I remember it correctly.
At the start of the book/movie where Rachel (Ellie Cornell) and Lindsay pick Jamie (Danielle Harris) up from school, in the car, there's a line in the book, (as far as I can remember) that Jamie, I think tickles Rachel's ribs in the car.
My quotes are the best I can remember, without actually reading them.
Jamie - "I want to go trick or treating, like the other kids".
Rachel" - "But, I thought you didn't want to go Trick or Treating?"
That's all in the movie. But the novel adds in something like -
Jamie - "A girl can change her mind.... can't she?"
"And with that, Jamie reached around her little fingers catching Rachel's ribs and began to tickle, making her older sister let out a giggle and squirm in the passenger's side seat".