Nothing was going right. I tried to order dinner for delivery and kept failing. We decided to watch a movie, picked Martha Marcy May Marlene, and the Blu-ray didn't work. I threw up my hands and watched Train to Busan again.
I wrote about it three years ago, and I'll cut-and-paste some here:
Train to Busan is constructed like a classic thriller. Right from the start, there are intimations of the horrors to come, but they are only intimations. Still, the suspense is serious (after all, we know the zombies are coming). And once the zombies arrive (fairly quickly), the suspense is replaced with open-jawed thrills.
Two things in particular make Train to Busan impressive. First, there is a dedication to the characters, who are painted in quick scenes but who always feel slightly more than stock from the genre's closet. We care about the characters, which isn't a necessary component to a zombie thriller, but it does lift this movie a bit above the rest. Second, the zombies really are impressive. It's not just that they are fast, it's that they feel real. I don't know how much, if any, CGI Yeon used, but it's very old-school in its presentation, as if instead of going straight to the computer, they actually hired a bunch of extras. Yeon's previous work was in animation, and the zombies have the kind of physics-defying qualities you'll see in cartoons.
The tension is mostly non-stop, with little time to take a breath. I don't suppose Train to Busan will appeal to people who don't like zombie movies, but it certainly ranks high within the genre.
The only thing I'd add is that it fit right in with our times. The zombie breakout is like a virus, and the government pretends everything is OK. It's not. I really like this movie, and enjoyed a second visit.