Positional dizziness: You may have a condition called benign positional vertigo which causes a brief spinning sensation with change in head position. This can be diagnosed and treated with what are called repositioning maneuvers, also called epley maneuvers. See an ear specialist. ...Read more.
Khomeini was a marja (source of emulation, also known as a Grand Ayatollah) in Twelver Shi'a Islam, but is most famous for his political role. In his writings and preachings he expanded the Shi'a Usuli theory of velayat-e faqih, the guardianship of the jurisconsult (clerical authority) to include theocratic political rule by the Islamic jurists.
A good overview of the Iranian Revolution is on the web, as well as a paper on the religious background of the revolution. For biographical information, see Reza Shah, Jimmy Carter and Ayatollah Khomeini (1902-89). There are many biographies of Khomeini, including this one.