The harrowing motion picture follows a group of terrified passengers on a bullet train from the capital city Seoul to coastal town Busan during a countrywide zombie virus outbreak.
The passengers on the train must fight the vicious zombies to stay alive, usually by striking them on the head to defeat them.
The film is even mentioned in All of Us Are Dead, by main character Lee Cheong-san, who compares their bleak situation to the 2016 film.
However, zombie fans were left wondering why the teens didn’t use some of the same tricks seen in Train to Busan to protect themselves from the zombies.
Fans online identified one key way to kill a zombie is by aiming for their heads. Characters Seok-woo (played by Gong Yoo).Min Yong-guk (played by Choi Woo-shik) go one step further by protect their forearms using tape, to stop the zombies from biting them.
One fan tweeted: “#AllOfUsAreDead is great but I still think it could've done better like they've mentioned train to busan, why didn't they copied the way the gong yoo, woo shik, and don lee covered their forearms to avoid getting bitten.”
While another viewer asked: “If the universe of #AllOfUsAreDead watched train to busan, shouldn't they have been more alert the first time they saw someone acting like a zombie.”
Another person tweeted: “Why is no one aiming for the heads of the zombies?”
Similarly, another fan said: “For a show that references zombie films, they sure forget to go for the head #AllOfUsAreDead”
In later episodes, the humans in All of Us Are Dead start aiming for the head when fighting the zombies.
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All of Us Are Dead is available to watch on Netflix now.