“Off-kilter” is one way to describe the feverish approach of Krisha, the feature debut of writer/director Trey Edward Shults. As a stylistic choice, off-kilter ain’t easy to pull off. This movie opens with one long take, as a 60-something woman parks on a blandly suburban street and pulls her wheeled luggage to a big anonymous house. She’s our title character, as we learn when the door opens and various members of her family welcome her inside. But we already sense this is not a regular Thanksgiving reunion. Krisha has been angrily muttering to herself, in the manner of people who are just barely holding it together, and her family’s greetings are cautious, as though there are eggshells scattered around the house ready to be trampled on. This long shot has a funky, uncomfortable rhythm, as the camera finds strange places to perch and the soundtrack takes on the odd quality of tinnitus.