On June 9, 2001, about 2015 central daylight time, a Cessna 150D, N5919T, piloted by a private pilot, sustained substantial damage on impact with trees and terrain during climbout from a private field near Milltown, Wisconsin. The personal flight was operating under 14 CFR Part 91. Visual meteorological conditions prevailed at the time of the accident. No flight plan was on file. The pilot reported minor injuries. The local flight was originating at the time of the accident. The pilot stated, "No recollection of the accident." A witness stated: I was nearly done mowing and observed the second takeoff from about midway on the 1300 foot grass headland of my bean field. He lifted off about midway and began to climb but he seemed to be a bit slow for a climb. The plane banked slightly to the left away from the tallest tree and then lost altitude and disappeared from my view behind another fence row. I did not observe it flying again and ran to the woods where I suspected I would find the plane. The wings were badly damaged and the plane was pointing west, opposite of my last observation, with the undamaged tail in a tree but engine and propeller in the ground, nose gear was broken off, but main wheels had apparently not touched the ground in the crash. [The pilot] was hanging out of the left door, bleeding from his left eye and not conscious. Due to the gasoline leaking and my fear of a fire I turned off the electrical switch and carefully removed him from the cockpit by unfastening his lap belt and getting his feet from under the rudder peddles and easing him to a safe place about 6 feet away. From my cell phone I finally contacted the 911 people (I had attempted a call before reaching the site but got no answer) and help was quite quick to arrive but to me of course they seemed rather slow. ... The time of my 911 call is recorded in the cell phone as 8:23 PM. My recollection is that the flaps were near full extension as he attempted to climb and as they remain now after the crash, probably the same position they were in when he landed the first time. A Cessna 150 manual was reviewed. The manual stated, "Flap deflections of 30 [degrees] and 40 [degrees] are not recommended at any time for take-off."