There's nothing quite like a movie where the clock's ticking with the stakes high. The race against time is as old as cinema itself. Damsels in distress tied to train lines by ghastly villains with a "will he? won't he?" hero speeding to the rescue. The inevitability of the day being saved is often not as inevitable as it might seem, but the nail biting is ever present. Here are a few of my favourites.