Martin Lawrence, Tim Allen, John Travolta, and William H. Macy in Wild HogsWILD HOGS

I try. Honest to God, when sitting in a crowded auditorium, watching a charmless, lazy, ridiculously unfunny movie such as Wild Hogs, I try to get on the audience's wavelength and figure out what it is that's making them howl with laughter.

Heath Ledger and Jake Gyllenhaal in Brokeback MountainBROKEBACK MOUNTAIN

In Ang Lee's agonizingly fine romantic western Brokeback Mountain, two taciturn young men - Ennis del Mar (Heath Ledger) and Jack Twist (Jake Gyllenhaal) - are hired, in the summer of 1963, to tend flocks of sheep on a Wyoming expanse. During the early days of their tenure, the men barely speak. Yet as the months pass, they form a solid friendship, and on one particularly cold night atop the mountain, Ennis and Jack share a bottle of whiskey and a sleeping bag, and - experiencing wordless, nearly aggressive desire - have sex. Despite the inevitability of the encounter, the sheer, naked hunger of the scene is startling, but a greater surprise comes some 20 minutes (and four years of screen time) later, in a scene so powerfully, emotionally true that - like much of Lee's transcendently moving work - it hits like a slap in the face.

Jake Gyllenhaal in JarheadJARHEAD

In movies, nothing is harder to define than tone, and the tone of Sam Mendes' Jarhead, based on Tony Swofford's Gulf War memoir, is so elusive that, hours after it ends, you might still not know what to make of it. In many ways, the movie is like a two-hour expansion of Full Metal Jacket's first 40 minutes, as the 20-year-old Swofford (Jake Gyllenhaal) and his fellow Marine recruits, pumped up to an almost insane degree, train for their mission in the unbearable desert heat and prepare for battle. In Mendes' film, however, there is no battle for his protagonists to respond to; the war ends while the Marines' bloodlust is still reaching a boil. The film is, in many ways, about the maddening banality of service, and it has resulted in an occasionally maddening movie, but its shifting tones and air of unpredictability make it impossible to shake off; at the finale, you might not know exactly what you've seen, but you certainly know you've seen something.

Gwyneth Paltrow and Jake Gyllenhaal in ProofPROOF

Most cinephiles detest filmed versions of plays, with their awkward exposition, stagy dialogue, and functional, assembly-line characters who serve their purpose within the author's conceit and exit just in time for another character to show up and do the same; oftentimes, you can all but see the proscenium arch hovering overhead.

Jake Gyllenhaal in Donnie Darko: The Director's Cut

DONNIE DARKO: THE DIRECTOR'S CUT

After I first saw Donnie Darko on DVD some 16 months back, I did something I'd done only once or twice before, and never again since: I returned to the main menu, hit "Play," and watched the movie again.

Jennifer Aniston and Jake Gyllenhaal in The Good GirlTHE GOOD GIRL

The Good Girl is the most fun I've had at the movies since Spider-Man and, with the possible exception of Y tu mama tambien, the finest movie I've seen all year, and I can't begin to describe how shocking that is.