The Lost Boys (1987)
In which Santa Carla has all those damn vampires
Basically playing Bella to Kieffer Sutherland's Edward, Haim's the biggest character in the film who isn't a vampire. This was his first turn with Feldman, introducing what would become the actors' familiar dynamic: Haim plays a relatively normal, slightly effete guy, and Feldman's a tweeked-out kid educated by comics and haunted by the occult.
Haim's best line: "I'm at the mercy of your sex glands, bud." Recommended clips: The Michael and David fight scene, Haim and Feldman interviewed about the movie, and, here we go, the entire movie on YouTube. Part one below:
License to Drive (1988)
In which Haim implausibly dates miles above his station
The quintessential Haim/Feldman flick. Feldman's penchant for oversized sunglasses makes him look pre-pubescent, and because Haim's love interest, Mercedes, is played by a stunningly coifed Heather Graham. It's been a rocky romantic road for Graham since her real-life dalliance with Haim (she apparently considered Ed Helms a step up).
"Drive" is notable for this coming-of-age Orwellian pronouncement: "God giveth, and the DMV taketh away. You mustn't f*ck with the Department of Motor Vehicle. We can make your life a living hell." As for clips, this chipmunkian reel of Haim, sped up for comic effect, is a keeper. Below, the original trailer, featuring Billy Ocean's "Get Out of My Dreams":
Dream a Little Dream (1989)
In which Corey Feldman basically plays the Jodi Foster/Jamie Lee Curtis role from "Freaky Friday"
Basically a tepid antecedent to Freaky Friday, Dream a Little Dream sees Haim playing backup for Feldman, who's switched bodies with a mewling suburban hippy (Jason Robards, that spring chicken). The movie's notable for two things: Haim acknowledges his gameshow fetish ("I'm dreaming. Apache women. Mai-taihs. Vanna White and a whip") and Dream a Little Dream 2, which you may remember from its alternate title, Nightmare on C-Lister Street.