There's a difference between spooky and scary.
Precognition can be both.
Suddenly, inexplicably, before the plane takes off, he has a premonition of doom. Screaming that there will be a crash, he freaks out and is escorted off the aircraft, along with six of his friends. When the plane does take off it, there is, indeed, an explosion. That's a question that gnaws not only at Sawa and his cohorts but also at FBI agents who have been alerted to the bizarre coincidence. They know how to eliminate characters in shocking, not to mention unusual, circumstances.