Dr. Reiman is an active clinical researcher, an educator within Duke University's Physical Therapy Division.
In an article written for the British Journal of Sports medicine (bjsm.bmj.com) Dr. Reiman has undertaken a systematic review and meta-analysis of clinical tests of the hip (http://bjsm.bmj.com/content/early/2012/07/07/bjsports-2012-091035), and in these series of videos he will demonstrate some of these techniques.
In this video he demonstrates the flexion internal rotation test. The aim of the test is to re-create a mechanical abutment, and hence the clients pain.