The airplane was substantially damaged while landing at 1615 Eastern time. One Private pilot aboard received serious injuries; another Private pilot sustained minor injuries. Visual conditions prevailed. One of the pilots later reported the airplane was floating on final approach when it was caught in a gust of wind. The airplane subsequently nosed over, impacted the ground, and caught fire. A witness observed the airplane about 10 feet over the runway, during what appeared to be a normal landing. Then it was lifted in a vertical motion to an altitude of approximately 30 feet. The airplane nosed over and impacted the runway. Recorded weather at the field included variable winds at 3 knots.