There was a reasonable explanation behind Little X's reaction and the way Chen Chen seemed to put this movie in a category of its own. It was because this movie was closely related to the hidden secrets of the USB drive.
Chen Chen was once afflicted by an antimeme known as "I Saw You!". It was later discovered that the previous owner of the USB drive was the one who had set up the antimeme. It was also the closest Chen Chen ever came to dying since acquiring the USB drive.
Chen Chen suspected that this antimeme originated from Event Horizon.
Another piece of information that reinforced Chen Chen's belief was that the first time he cracked the quantum computer Adam, he discovered a message left behind by the previous owner of the USB drive. The message contained a mention of the movie Event Horizon.
