Netflix, and it's one that you should add to your watch list pronto!
Train to Busan (red our review HERE) is a kick-ass little S.Korean zombie flick that might be a bit sappy with some of its sentiment (not a lot of happy endings in this one), but delivers a ton of awesome action, most of which comes while its characters are trapped within the confines of a speeding train.
Sang Hwa was one of the coolest characters of 2016. When you see the movie, you'll understand why.
Watch it HERE.
Netflix has also added Evolution to its library as well, so you might as well make it a double feature. You can watch it HERE.