This movie was listed as an Action/Comedy genre but really the comedic parts were barely noticeable and were more cute than comical. That's fine to be honest as it added some charm points to the characters and made them lovable.

Jo Jungsuk as Yongnam was very adorable as a character. It's very cute to see him very passionate about his hobby to keep practicing his skills and maintaining his fitness. In which it ended up being quite useful during his attempt to save his family and himself from the dangerous toxic gas.

Yoona as Yongnam's ex who also used to take part in the rock-climbing/mountaineering hobby makes a great counterpart to Jungsuk's character. It was so cool to see them climbing walls and jumping from building to building in order to reach safety, using the skills that they know. It was a terrifying experience to go through but they still braved it out and still managed to selfless whenever they found other people more in need of saving than themselves. It made their characters so endearing and makes you wanna cheer for them to success in saving themselves. It was really heartwarming especially when you see so many people trying to help them by sending out their own drones to find them.

This movie was really fun and keeps you on your toes to see how the fate of the characters will turn out in the end. It's a really good disaster movie with great action that'll keep you rooted on the spot. And the Superhero song at the end really wrap the whole package and provide a satisfying ending to the movie.