1. The group of students. Why kill them? What did they do? Why were they a threat?
2. The husband and wife. How come grown-up children didn't know the difference between a real shotgun and a toy??
1. Well they were in the wrong place at the wrong time
2. This is a joke of Bava. To end a movie with black humor. It doesn't have to much sense but it's funny and unexpected
1. The group of students. Why kill them? What did they do? Why were they a threat?
One of the girls found a body, therefor she had to die. Her friends would have noticed her dissapearance and drawn unwanted interest from the authorities if they escaped.
2. The husband and wife. How come grown-up children didn't know the difference between a real shotgun and a toy??
Because it was funny, ironic and unexpected
Somebody here has been drinking and I'm sad to say it ain't me - Allan Francis Doyleshare