Interviewee was assigned to AG from August 21, 2003 to March 29, 2004 as a member of Internal Reaction Force. Stated that he/she witnessed and reported two incidents (the events were not described). Observed "several instances of both MPs giving physical training sessions to detainees as punishment measure to include what is called 'rocking,' whereby the detainee is made to kneel on gravel or rocks as a control measure." Also, observed "excessive" yelling.