Maybe she wanted to ask something and then just got scared?
I remember as a kid we were playing hide and seek over at a friend's house. Someone got all upset because he said one of us went into his garage and shut the garage door. None of us would have done that, but I do wish that guy would have had a camera so he would have had evidence that no one was in his garage or doing anything on his property.
I have a feeling a family member shut it or he just forgot and when he saw a kid not even in his yard running around he thought he still had it open and blamed it on "hooligans."
Camera would have been exceptionally rare back then though... That had to be 97?