On May 3, 2025, about 1530 central daylight time, a Cessna 182P, N9415M, was substantially damaged when it was involved in an accident near Kentwood, Louisiana. The pilot sustained serious injuries, and the passenger sustained minor injuries. The airplane was operated as a Title 14 Code of Federal Regulations Part 91 personal flight. The pilot stated that he intended to depart from a 2,600 ft private grass strip, which was surrounded by trees on both sides. Before takeoff he completed an engine runup with no issues noted and ensured the flight controls were free and correct. He extended the flaps to 20° and verified the pitch trim was in the takeoff position. During the initial climb and after the airplane was clear of the treetops, he turned left toward the destination airport when the airplane made an uncommanded and abrupt pitch up. He attempted to decrease the pitch attitude with the control yoke and adjust the pitch trim, but the airplane continued to pitch up. The stall warning horn sounded, and the airplane descended into trees and terrain. The passenger was able to release her seat belt and remove herself and the pilot from the airplane. The airplane sustained substantial damage and there was no postimpact fire. The last airframe annual inspection and engine 100-hour inspection were completed on July 14, 2024. There were no unresolved discrepancies noted in the logbook entries for these inspections. The airplane has been retained for further examination.