A haboob (Arabic: ÙÙØ¨ÙØ¨ â habÅ«b blasting/drafting) is a type of intense dust storm carried on an atmospheric gravity current, also known as a Weather Front.Haboobs occur regularly in arid regions throughout the world. haboob approaches Taji, Iraq, in 2006. A haboob hits the South-East Valley, Gilbert, AZ, USA, on 5 July 2011, around 7 p.m., hiding San Tan Mountain completely.
applying a blood choke means locking the opponents neck in a restrictive manner to cut the blood flow from both the Perotid and Carotid arteries in the neck as philip has said. but with the links he's also provided, it should help fairly well.
People in the experiment were deemed unconcious from 1.6 seconds to almost 10 seconds after the choke began. Others were not choked out after 20 seconds. If you held the person who was unconcious after 1.6 seconds for another 8 or 9 seconds, you could cause permanent brain damage or death.