The titular character of Ferris Bueller's Day Off, Ferris' greatest strength is the incredibly charmed life he leads. He has the hottest girlfriend. He has the raddest computer. He has the friend with the biggest mental issues. Everything breaks Ferris' way, and it would be a surprising, even shocking thing indeed if he ended up brutally murdered in the first 10 minutes of this story.
Life is about to stop moving pretty fast.
Unfortunately for Ferris, he's in that 16-to-23 demographic that fares very poorly during slasher movies. Psychopaths love murdering teenagers, giving in to the urges we all feel but rarely act on.
Teens are right to be mistrustful of grown-ups, detecting the faint but very real desire we all have to murder them.