Tucker and Dale opens with a faux-verite sequence in which a pair of newspeople have gone to the scene of a massacre to do some investigating on their own. For some reason, they've gone in the middle of the night. Anyhoo, they both get murdered by this guy:
And then it cuts to:
Well, first off, it's "Three Days Earlier", since the movie isn't taking place on the day I'm watching it - that wouldn't make sense - more importantly, though, moments later we're introduced to the college kids who are headed out into the wild for the week, and among their number is this guy:
Who's obviously the killer from the opening sequence. Which means that we've had the film's entire narrative arc (college guy goes progressively more nuts, bedeviling the main character, until he's almost killed, but survives at the encounter) spoiled for us.
Thanks for ruining all the surprises the film had to offer, filmmakers.
Still, though, quality movie, you'd just be better off skipping the first minute.