He stated he first realized something as wrong when the motorcycles began moving from their regular course and at or just before this he heard sounds that could have been shots. Mr. Johnson stated at that time he did not know that it was shots and he could not say how many shots he heard. His attention remained on the vehicle carrying President Kennedy and he observed this car until it sped away. Mr. Johnson stated that white smoke was observed near the pavilion, but he felt that this smoke came from a motorcycle abandoned near the spot by a Dallas policeman.