“Bedtime here is 9:30,” Grandpa announces before lights out. “It’s probably best you two shouldn’t come out of your room after that.” OK, Nanna and Grandpa are, well, grandparents. But if that doesn’t seem a tad odd, wait until you hear what Nanna comes up with much later in the kitchen. What you get when you team writer-director M. Night Shyamalan with “the producer of Paranormal Activity, The Purge, Insidious, Sinister” is The Visit, which stars Deanna Dunagan and Peter McRobbie as the more than fairly odd grandparents. Kathryn Hahn is their daughter, whose children are Ed Oxenbould and Olivia DeJonge. Universal today posted this official trailer online, which has been in theaters for several days. It’s slated for Sept. 11. What do you think?