Incident Summary
A pilot reported a landing incident on a grass runway. After checking the wind sock, the pilot initiated an approach over trees. The first approach was deemed uncomfortable, leading to a go-around. The second approach and touchdown were reportedly normal, but two witnesses observed a wind shift at the moment of touchdown. After landing, the airspeed was too slow for a go-around, and the groundspeed was too fast to stop on the grass runway. The aircraft continued off the end of the runway, struck a ditch, and nosed over.
Pilot Report
The pilot estimated the wind was blowing at 8 to 10 knots. At touchdown, the wind switched from a headwind to a tailwind. The density altitude was approximately 3,400 feet. No other factors were specified in the report.