On July 25, 2018, about 0930 Pacific daylight time, a Piper PA-32-300, N4747H, was substantially damaged when it was involved in an accident in Avalon, California. The private pilot sustained serious injuries and the two passengers sustained minor injuries. The airplane was operated by the pilot as a Title 14 Code of Federal Regulations Part 91 personal flight. The pilot reported that he did not remember the accident but did state there were no mechanical failures or malfunctions with the airplane prior to the accident. The airport manager reported that when the airplane was on downwind, he advised the pilot of the wind which was 330° at 4 knots. He stated that the pilot's first landing attempt was too high, and the airplane went around. On the second landing attempt the airplane was "still too high and came in too fast" but touched down past about midfield. As the airplane neared the end of the runway, he heard the engine "rev up" and observed the airplane depart the runway in a "very nose high" pitch attitude. The airplane subsequently collided with terrain about 1,000 ft beyond the departure end of the runway and about 75 to 100 ft below the runway surface elevation in a nose low attitude.