Cinemark Dallas adds "Oppenheimer" showtimes

• There are just 30 such theaters in the world.

Details: The three-hour movie spans 11 miles on film. Before a 10:45pm Thursday viewing, a movie theater employee held up a strip of film as tall as himself. It accounted for just one second of the movie.

• Sometimes the movie fills the entire five-story screen at Cinemark Dallas. In other scenes, the top of the screen stays black, a directorial choice.

The intrigue: A movie theater employee encouraged everyone to take a restroom break before showtime. The line into the men's restroom snaked outside the door. Not so for the women's.

If you go: There are no previews. Arrive early. Consider wearing cozy clothes. Many filmgoers wore pajamas at the late-night showing.

• If you browse tickets and see options, buy them quickly. Available seats likely won't last.

Of note: The "Oppenheimer"-"Barbie" double-header is likely to be the last major weekend opener at the box office for some time.

• The ongoing Hollywood writers and actors strikes make it unlikely any film will be able to market itself to the same extent.

The bottom line: "Oppenheimer" is visually stunning. It's worth the IMAX experience.