The pilot of the balloon stated that at the conclusion of the local flight, he was making an approach for landing near a field. At 15 feet above the ground, the pilot pulled out the top of the balloon and landed without a bounce. The balloon then dragged across the ground for 20 feet and came to rest. Prior to landing, the passengers were briefed for a possible hard landing. The pilot noticed that one passenger did not assume the proper brace position. That passenger was seriously injured during the landing and the balloon was not damaged.