Brown ground beef in a medium skillet over medium heat. Drain off liquid and mix in taco seasoning. Lightly crush the Doritos while the bag is still sealed. Carefully cut the top off of each Dorito bag, getting as close to the seal as possible so that there plenty of room in the bag to work with. Add the hot seasoned beef, cheese, tomato, lettuce, olives, sour cream and taco sauce. Eat out of the bag with a fork.