On July 8, 1994, at 1150 central daylight time, a Piper PA-22- 150, N2936Z, sustained substantial damage during landing at a private air strip near Ravenna, Texas. The private pilot was not injured. Visual meteorological conditions prevailed for the personal flight. The pilot stated he was ferrying the airplane to the airport for repairs. While landing to the south, the airplane touched down on the 1,700 foot wet grass strip approximately 700 feet from the departure end. As the brakes were applied, the airplane began to slide. The airplane ran off the end of the runway, and impacted a culvert that paralleled a road at the end of the runway. The airplane nosed over and came to rest inverted on top of a pickup truck that had been traveling along the road. A car that was also traveling along the road struck the airplane. A Federal Aviation Administration inspector reported that the pickup truck received minor damage, and the driver and two occupants were not injured. The car also sustained minor damage. The driver was not injured and one occupant received minor injuries.