American football fans know that ‘the blind side’ is the quarterback’s vulnerable spot when he’s scouring the field for a pass. Moviegoers attuned to the metaphorical nature of film titles can guess, however, that the phrase applies to more than just grid-irony in John Lee Hancock’s based-on-a-true-story parable. Society’s blind side, you see, is where impoverished, hulking African-American athlete ‘Big Mike’ Oher (Quinton Aaron) lived until plucky Southern mother Leigh Anne Touhy (Sandra Bullock) took him in. (Tough-talking mamas from Tennessee: what can’t they fix?)

As for the saving glories of the game, you’ve first got to suffer through an hour of Big Mike’s bleached-blonde guardian angel dropping saintly Hallmark platitudes. ‘You’ve changed his life,’ one character tells Leigh Anne. ‘No,’ she says, complete with elongated dramatic pause. ‘He’s changed mine.’ Garrggh! Just bring on the sports-movie clichés already.

It’s tempting to think that this vanilla take on a stock inspirational tale exists to make an expressionistic emotional steamroller like Precious seem even more graceful than it is. What’s worse than its triteness, however, is the way the movie regards this at-risk youth as nothing other than a vehicle for making suburban mums feel better about themselves during the post-screening drive to the supermarket. ‘Is this some sort of white-guilt thing?’ a ready-made villain asks rhetorically. Actually, no; it’s just blinkered middle-class pandering at its most shameless.