On April 8, 1996, at 1615 hours Pacific daylight time, a Cessna 185F, N61905, experienced a loss of directional control and nosed over while landing at the Placerville airport, Placerville, California. Visual meteorological conditions prevailed during the instructional flight. The airplane was substantially damaged. Neither the certified flight instructor (CFI), nor the airplane's owner was injured. The flight originated from Placerville at 1600. The owner held a commercial pilot certificate, and he had just purchased the airplane from the CFI. The owner desired to be checked out with the airplane's conventional landing gear. In the CFI's completed "Aircraft Accident Report," NTSB Form 6120.1/2, he reported that he talked the owner through the first landing. The CFI performed the second landing, and attempted to demonstrate a normal three-point touchdown. According to the CFI, the airplane touched down on runway 23 in a three-point attitude, and then it veered to the right. The CFI reported that he attempted to correct the action by applying left rudder, but the airplane continued rolling to the right. The airplane exited off the side of the runway, entered a dirt area, and nosed over. No mechanical failures or malfunctions were experienced.