Two men were playing tennis, when one drew the attention of the other to a very bright object moving very rapidly across the morning sky at a very high angular velocity. They estimated its altitude at 25,000 feet or greater. The object was as bright "as a magnesium flare, was very thin in appearance, but it appeared to have no wings. It flew with a wobbling motion. One of the observers is a pilot, with a great deal of experience around aircraft under varied conditions.