What percentage of a film has to be great for it to be worth watching? The Walk, Robert Zemeckis’ dramatised account of Philippe Petit’s lunatic mission to tightrope walk between New York’s Twin Towers, is perhaps 25 per cent terrific, tops. Yet those 30-odd minutes are so good, they just nullify all the other meandering, irritating minutes around them.
If you’ve already seen Man On Wire, 2008’s Oscar-winning documentary about Petit, then there’s little here to demand another two hours of your time. Petit was an exceedingly self-confident street performer, who in 1974 read about the construction of two 415-metre towers in Manhattan. He decided he had to walk between them, even if it might land him in jail, because this is the sort  of thing Petit thinks.
But an – those last 30 minutes in 3D on the tight rope. Just breathtaking: