I was driving down I-10 between Houston and Lake Charles, Louisiana. I saw an airstrip with two Ag-planes. One plane was on the runway, ready to takeoff . Further down the road, I saw the same plane, spraying a field. Now I always thought Ag-planes flew low and slow, relatively level, and sprayed fertilizer/herbicide/etc at a leisurely pace. NO! This plane was spraying a large field, with power lines at one end, and tall trees at the other. The plane never remained level for more than 2 or 3 seconds. It would come in at a steep dive, spray the chemicals, nose up sharply, almost do a complete wing-over, and repeat the process. It looked incredibly dangerous, and I realized then that crop dusting was something totally different than I thought. Before you become an agricultural pilot, you better watch one of these planes in action. They fly low, the maneuvers are violent, the CoG of the plane is constantly shifting, and there is no altitude for mistakes.