Final Destination (2000)

Popular addition to the post-Scream ironic teen horror boom, the longevity of which as a franchise must have surprised even its biggest fans.
Ironically, given how soon after Scream it came, critics were even at this stage praising it for its general seriousness and for eschewing the nudge-and-wink approach that was already standard, and already staling.
It also re-integrated supernatural themes with the new formula, and in its biggest error of judgement, revived the hoary old idea of giving all the characters the surnames of famous genre actors and directors.
Time has not been massively kind overall: a nail-biting opening segues into an inevitably anti-climactic whole, since once the ingenious premise is established there is nothing left for it to do, other than punctuate mechanical suspense with ingenious vignettes of spectacular death. Four sequels followed, and more may yet join them, suggesting that no matter how formulaic the material - and to be honest, this pretty much redefines the term - they'll keep coming out to watch teenagers die provided you can keep coming up with inventive ways for it to happen.