A couple of weeks ago, my family and myself were on an American A300 bound for Lima from Miami. I was seated in the 34th row, when I noticed that the captain did not deploy the take off flaps. We moved into take off position then I heard the engines at full roar. I saw that the flaps were not deployed (I figured the front slats were down into position) and I nearly had a heart attack. Of course, we took off normally and I was left stupified. Is this a normal practice for 767s,A300s, etc???