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.
In sports, a choke is the failure of an athlete or an athletic team to win a game or tournament when the player or team had been strongly favored to win or had squandered a large lead in the late stages of the event. Someone who chokes may be known as a choker or, more derisively, as a choke artist. Choking in sport can be considered a form of analysis paralysis. It is often an over-used term in the sports world, where choke status is assigned to a team or player that only lost a small lead or was not heavily-favored to win.