Congratulations, 21st century: With Thunderstruck, you now have your very own Kazaam!

By that, I mean a family-oriented fantasy comedy featuring a current NBA superstar imbued with supernatural powers, playing second fiddle to an annoying kid, and saddled with a lazy script. (I’d expect nothing less from John Whitesell, director of such laff vacuums as Big Mommas: Like Father, Like Son, Deck the Halls, Malibu’s Most Wanted and See Spot Run.)

Oklahoma City Thunder’s Kevin Durant plays himself, while Nickelodeon kidcom vet Taylor Gray essays the role of Brian, a 16-year-old high school student who loves shooting hoops, but has the aim of a postcoital penis. Through a crushingly stupid idea that the screenwriters make no attempt to unexplain, the Durantula’s mad b-ball skillz are switched with Brian’s lack of when the two simultaneously touch a basketball during their meet-cute off the court.

Therefore, Brian becomes a cocky and popular athlete, while his well-paid hero suffers “a slump.” Oh, if only the curse could be reversed! It can, of course, but how that comes to pass is an insult to viewers’ intelligence, making one long for the relative concrete logic of 18 Again! and Vice Versa.

Potentially more insulting is not that it perpetuates the myth that African-American youth are interested in World of Warcraft, but that Whitesell allows Durant to shill his Nike shoes with a commercial in the middle … and again at the end. Lord knows how talk-show host Conan O’Brien was corralled into a credibility-shattering cameo, but the casting of Jim Belushi is no mystery. He plays Brian’s coach, who screams to his team — or perhaps craft services? — “Put some jelly in that doughnut!”

Yes, Durant is perfectly affable, because he’s not really acting. And yes, Thunderstruck is wholesome and inoffensive, but if that’s all you ask of a family film, you’re settling, because they can be smart and funny, too. This one’s woefully wretched — the cinematic equivalent of an air ball. —Rod Lott