On April 19, 1999, at 1000 eastern daylight time, a Cessna 140A, N9462A, nosed over during an attempted landing on a short grass strip near Dallas, Georgia. The instructional flight was operated by the pilot under the provision of 14 CFR Part 91 with no flight plan filed. Visual weather conditions prevailed at the time of the accident. The airplane sustained substantial damage. The flight instructor and the dual student were not injured. The flight departed Rome, Georgia, at 0945. The flight instructor was demonstrating a short field landing onto the grass airstrip. During the landing roll, the flight instructor realized that a safe roll out was not possible. The flight instructor initially attempted a go-around with full flaps extended. When the airplane did not become airborne during the go-around attempt, it collided with a grassy rise on the runway and nosed over. Examination of the aircraft revealed damage to the right wing, left wing and main landing gear. Also there was propeller damage, windshield damage, vertical fin damage and wheel pants damage. The flight instructor reported no mechanical problems with the airplane.