spill cam. according to the latest government estimates between 20 and 40,000 barrels of oil have been escaping into the gulf daily. at the worst, that estimate is more than 100 1.6 million gallons a day. so what is actually causing the oil to keep gushing out with such force? anita vogel in our los angeles newsroom tonight to sort of break it down. what of it, nita. hi there, shep. a lot of people following this coverage might be confused why this oil is still gushing when there is no one pumping it out. the answer is there is a lot of pressurized gas inside an oil reserve. and when you pun temperature it that pressure lifts the oil to the surface with a lot of force. earlier we got a lessen lesson in oil drilling 101. pressure in the reservoir pushes the oil out. we need to manage that. oil professor compares the process of extracting oil to gas bubbles in a bottle of soda. imagine for a time being that