At about 11:48 central time, a Beech 95-C55 lost engine power and crashed on initial climb from runway 31 at St. Cloud Regional Airport. The pilot was seriously injured. A witness said he saw the plane taking off and climbing to about 200 feet agl when it banked steeply to the right and began to go inverted. The pilot said he was at about 150 feet when the right engine lost power. No cause for the power loss could immediately be determined.