Is this horror?

The pinnacle of cinema. One of those movies that makes one feel totally insignificant for the hours, days, and weeks after you've seen it.
In the hands of other directors or editors, the back-and-forth narrative would've been a total mess... but Christopher Nolan and Emma Thomas timed the entire movie to perfection. Paired with some of the best acting, sound design, and music I've heard in years... bravo. I am shook.