It’s the suffocating inevitability of what is done to the girl that makes you keep grimly watching. Mexican director Michel Franco’s film is about people with nowhere to turn, expressed most brutally in the bullying of its teenage heroine Alejandra (Tessa Io). But the title refers to the death of her mother Lucia in a car crash Alejandra was also in, which has left her burly, loving father Roberto (Hernan Mendoza) floating close to the mental edge, moorings loose and numb with inexpressible pain. Off-limits for aid, then, for his quietly practical, persecuted daughter.

Circus and church, and a whole lot of other extremes, come up against each other in bewildering opposition in Alejandro Jodorowsky’s re-released 1989 Santa Sangre, a cult film of which it could truly be said, “They don’t make them like this any more.” It’s practically a one-off, visually spectacular and musically vibrant; if you’re looking for equivalents, Buñuel, Ken Russell at his most hysterical, and the Italian horror-and-gore genre of the Seventies (think Berberian Sound Studio) are the nearest you might get.

The great Spanish surrealist film-maker Luis Buñuel was 72 when he made The Discreet Charm of the Bourgeoisie but it is as madcap a piece of weirdness as ever he came up with. It also won him the 1972 Oscar for Best Foreign Film. One of the great things about Buñuel is that, while his films are unhinged, dipped deep in artsy satire and opaque avant-garde concepts, they remain supremely watchable entertainment, often very funny.

Comedic curio Casa de mi Padre features Will Ferrell in his most surprising role yet – that of a Mexican rancher who “no habla inglés”. This Spanish-language film is a tongue-in-cheek thriller featuring Ferrell alongside Mexican stars Gael García Bernal and Diego Luna. It’s Acorn Antiques meets El Topo: frequently batty, wilfully inept and performed with aplomb by a sporting cast.

The last time that actor Brad Pitt and New Zealand director Andrew Dominik teamed up it was for the epic and elegiac western The Assassination of Jesse James by the Coward Robert Ford. Their new one, in competition in Cannes, couldn’t be more different.

The two parts of Henry IV parts 1 and 2 are very macho plays. Men drink, tell rude jokes, strut and lie their way into power and influence. In Globe to Globe's Latin American takes on the Bard, some hijo de puta and de puta madre seem fitting additions. In these two productions, machismo, in the style of the gangster or the swagger of the outlaw, was never in short supply.

In Gerardo Naranjo’s Miss Bala, an aspiring beauty queen becomes an unwitting accomplice in the dirty deeds of a criminal gang. If it sounds like the plot of a cheap thriller, it isn’t – it’s visceral and uncommon, capturing the ferocity and reach of Mexico’s criminal underworld and the terror of being caught in its crossfire.

Miss Bala, just to clear it up at the start, does not concern itself with beauty pageants. Or not like Miss Congeniality. Beauty is indeed involved in the form of Laura, a pretty young Mexican woman from a poor family who aspires to win the crown of Miss Baja California. Never has the advice to be careful what you wish for been more apposite.

A single snare drum greets you on entry to the Serpentine Gallery; there’s no one playing it, yet in response to an inaudible cue, the drumsticks begin to vibrate autonomously. Meanwhile on a nearby wall, a pair of blue rubber gloves revolves slowly as if searching for something; every now and then they take on the shape of human hands, as though embodying the gestures of the absent drummer.

Ex-voto paintings are a tradition in Mexico, an offering of gratitude to God and the saints for answered prayers, row after row of them lining the walls of Mexican churches, testifying to the congregations’ devotion, and to the enduring link between man and the spiritual. In artistic terms, however, these paintings, which have been created from the 16th century onwards, are one of the great national archives of folk art, extraordinary depictions of ordinary people: a moving, comic, tragic, epic narrative that is not to be missed.