Like “Green Book,” The Greatest Beer Run Ever is a broad historical outing based on real people and real events, condensed down into an essence that can only be billed as “crowd-pleasing.” The trick this time: Farrelly seems far more aware of how he’s playing fast and loose with history to offer a zippy feature to a fractured world. Dare we say it: It works far better.

Peter Farrelly's follow-up to Green Book is a war drama with some solid laughs and a great Zac Efron performance, but a manipulative script with ugly optics and boring visuals that never achieve the prestige it clearly wants.

Depth comes from Efron’s visible difficulty maintaining a smile as he comes to sense that he’s crossed the ocean only to discover a permanent gulf between him and his childhood friends. They’ve endured agonies he’ll never understand — and a barfly like him can’t deliver a cheers that will set things right.

This “beer run” from Inwood, Manhattan, to Saigon and “up country” environs starts jaunty, gets somber and sentimental and then goes oh-so-very-wrong. You’ll feel it the instant it happens, just as I did.

[Farrelly's] latest commits itself to regurgitating every Vietnam cliche with the laziest possible visual diction, led by an emotionally overextended Zac Efron.