On December 18, 1999, at about 1700 eastern standard time, a Cessna 152, N95775, registered to Profile Aviation Center Inc., operating as a 14 CFR Part 91 instructional flight, collided with bushes on initial takeoff climb from Wilson's Airport, Hickory, North Carolina (E40), and crashed. Visual meteorological conditions prevailed and no flight plan was filed. The airplane sustained substantial damage. The commercial-rated pilot flight instructor (CFI) and student pilot reported no injuries. The flight was originating at the time of the accident. The CFI stated this was his first flight into the airport. He was demonstrating a soft field landing and takeoff for the student pilot. The runway is a north-south grass runway. The runway is 2,200 feet long, has an up-slope to the north, and is canted (slopes) to the left. After landing, he made a 180-degree turn , back taxied down the runway, and prepared the airplane for the demonstrated soft field takeoff. He initiated the takeoff roll to the north, the airplane veered to the left due to the rough terrain, and was bouncing. The airspeed was between 45 to 50. He decided their was insufficient runway remaining in order to abort the takeoff. He continued the takeoff and became airborne about 1,500 feet down the runway. The left wing hit some bushes, he pulled the power off, the airplane rotated to the left collided with the terrain, and came to rest 270 degrees from his initial takeoff heading. When asked why the airplane veered to the left, the CFI stated he failed to maintain directional control.