If you get a chance go to Tate Modern and watch a bit of The Clock. It's a 24 hour film, or Video Installation, by Christian Marclay, made of clips from other films all of which reference time. Or as the blurb says:
24-hours long, the installation is a montage of thousands of film and television images of clocks, edited together so they show the actual time. It is a thrilling journey through cinematic history as well as a functioning timepiece.
Captivating and enthralling. It's one of those bits they have at the Tate Modern that make it worth it.
