Professor David Hickman is a very well respected trumpet teacher as well as a fine trumpet player. His newest project has been working with Clifford Blackburn to develop and make available a new five valve trumpet. In this video he demonstrates the versatility of this new horn and explains its use for simplifying fingering and improving accuracy.
I find it amazing that he is able to remember which set of valve combinations needed to be used in each example. To the average trumpet player this might seem a bit over the top but you have to realize that playing in an orchestra is not the same as playing at the American Legion on a Friday night.