Questions

I generally liked this slasher, but the script begs some questions:

Wouldn't the girls be perplexed at how a dead body mysteriously made it to the attic? What caused it to suddenly fall down the trap door? Why don’t any of the girls look at the face of the corpse to verify its identity? Would a couple of girls who know very little about guns seriously enact a prank using a questionable mixture of bullets and blanks?