Although scholars from various disciplines and worldviews explain the experiences differently, there are many firsthand accounts of exorcism experiences around the world. This 10-minute video excerpts material from a larger discussion on spirit possession experiences reported around the world.
It comes from a larger series available for free at: http://faculty.gordon.edu/hu/bi/ted_hildebrandt/DigitalCourses/00_DigitalBiblicalStudiesCourses.html#Matthew_Keener.