Need help for a project – What is Thailand’s most iconic cult film?

I’m working on a list of every country’s most iconic cult film (list here: https://boxd.it/n5ZFs) and wondered if anyone could help me figure out Thailand’s entry.
I’m looking for a film that might not be well-known outside the country’s borders. Perhaps it’s a film everyone knows, and is hugely popular only to Thai audiences, even if it wasn’t popular with critics. Or maybe it’s a film that wasn’t well-received by audiences or critics, but has gained a cult following in the years since its release. I did some research and have put “SARS Wars: Bangkok Zombie Crisis” as Thailand’s entry, but am open to changing it.
Any suggestions would be most welcome!

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