Fugues can be very dramatic and exciting as each part comes in one at a time and the music builds up. This is why many composers have ended long works with a fugue. It helps to build up the tension towards the end of the work. Even if it is not a strict fugue it might be “fugal” i.e. it might start off as a fugue and then become freer (adding extra parts etc.). Beethoven uses fugues a lot in the last movement of his late piano sonatas. Benjamin Britten writes a fugue at the end of A Young Person’s Guide to the Orchestra. At the end of his song for choir called “The Twelve” William Walton starts a fugue with a very long, fast and complicated fugues subject, but it soon develops into a much freer piece of music.