The Visit (2015)

Plot hole: When they left the camera out overnight to film Nana it would have had to be recording all night. A DSLR will not do this and does not do motion detection either.

Grandma: Yahtzee.

Trivia: M. Night Shyamalan personally financed the film so that he could have complete creative control over the final product. He wanted to make a low-budget, back-to-basics movie, as he had just finished working on a string of high-budget critical and commercial failures (including "After Earth" and "The Last Airbender") where he had little creative control due to the budgets and studio-mandates. It paid off, as this film, his next film "Split" and his television series "Wayward Pines" were generally considered a "return to form" for Shyamalan by critics.

Question: Why did Nana jumpscare the camera? Also, why did she have some sort of seizure when asked about Loretta?