what happened?

The clown starts killing all the people. Ollie tells Alison that he's always loved her, so she takes him upstairs and practically rapes him to finally give him what he wants. It's been awhile since I've seen it, so I can't remember exactly who gets away, but it has something to do with using the electrified fences. Anyway, the last scene zooms in on a man's hand, who has the same wound that someone gave the killer clown. He turns around and we see that it is Harrison, the farm's old caretaker, doing the killing. Apparently, he sneaks in and enjoys himself when the owners are away, and this whole kidnap scheme was ruining his plans.

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We never really grow up, we only learn how to act in public.