Inception - The spinning hallway fight used a real spinning set
Let's ignore the fact that, despite what Christopher Nolan may think, spinning hallways are not the type of thing most of us dream about. If he'd made an honest depiction of our nocturnal experiences, it'd be a bizarre blend of David Lynch film, porn flick, and children's cartoon. What he did give us was some jaw-dropping special effects sequences—when Joseph Gordon-Levitt takes on a foe in a tilting corridor, we all spontaneously forgot what a whiny loser he was in 500 Days Of Summer.
And we all owe more respect now that we know the scene actually relied on practical effects, rather than CGI. Nolan's team built a revolving hallway and choreographed the fight around it. Hopefully the actors had puke buckets on set.
Cliffhanger - A stuntman zip-lined from one plane to another
Back when Stallone could still non-ironically star in an action film, Cliffhanger got our blood pumping early on with a mid-air heist that culminated in a character transferring from one plane to another via zip line. Even without the effects of today, this could have easily been pulled off with composite techniques.