Around every corner is a new twist, a strategically placed misdirection or another switch of predator and prey. But while the gamesmanship is satisfying in moderation, it becomes a little monotonous in excess.

Crawford radiates charisma, and Pierce sells even the nuttiest moments.

The less one knows about this perverse thriller from debuting director Nick Tomnay the better; a full appreciation of its delights lies in its revelations.

This is not the type of movie whose inherent dopiness angers or frustrates. You just sort of giggle at the kids having fun.