Like, a horror movie that instead of scare you makes you laugh more than a comedy
A lot of people think Star Wars is science - fiction. But it is fantasy.
The Princess Bride. The title does not at all suggest that this is a comedy movie.
Deadpool famously advertised itself as a Valentine’s day romcom.
Donny Darko, maybe? All I knew was that it was a psycho thriller. I had to go on the internet to find out WTF I had just seen, because it’s also a sci-fi.
Cabin in the Woods, Tucker and Dale vs Evil, and Troll 2