On a scale of poor to terrible this film rates about a 9. Two kids go to stay with their estranged grandparents for a few days only to discover that there's something super odd about nan and pops. If it had have turned out to be a film about today's youth being afraid of the elderly it would have at least been provocative but, as expected, M Night Shyamalan can't help himself and inserts a stupid backstory and a nonsense reveal. Flat and not at all scary.