Tom Wilkinson (sporting an impressive American accent) stars as a man unhappy with his life. His unhappiness, as well as a series of other events (don't want to give anything away here) leads to his character having a crazy, adventure-filled night... The Night of the White Pants. Just about everything that can go wrong does, and often with hilarious results.
The characters are fairly unpredictable and realistic, locations are realistic and shot in interesting views and lighting, the acting is first-class, and the story draws you in. Great soundtrack too.