On September 2, 2001, approximately 0815 mountain daylight time, a Balloon Works Firefly 8B-15, N2575P, sustained minor damage during a hard landing near Colorado Springs, Colorado. The private pilot was not injured, but his passenger received a serious injury. Visual meteorological conditions prevailed, and no flight plan had been filed for the personal flight being conducted under Title 14 CFR Part 91. The flight originated in Colorado Springs approximately 0745. The following is based on a telephone interview with the pilot and the accident report he submitted. The pilot said he and his passenger were participating in the Colorado Springs Balloon Classic. They took off, leveled off at 1,000 feet, and flew south. The wind velocity increased to about 15 mph and the pilot decided to land. He chose a field in which two balloons had already landed. He briefed his passenger on the position to assume for a high wind landing. The pilot made a "stand up" landing, but a thermal caused the balloon to ascend about 30 to 40 feet. It touched down a second time and the pilot vented the envelope. According to the pilot, the "passenger's foot was out of position and twisted on impact." X-rays taken later indicated the ankle was fractured.