IMO one of the 10 greatest photographs ever made. According to what he later told St. Ansel, Lartigue, (who was still in his teens when me made it), know the result he would get by panning his camera as its vertical focal-plane shutter descended across the film plane. Thus, everything from the oval wheels to the leaning spectators was intentional. I don't believe that anyone else has ever done anything like it (although, of course, all racing cars photographed at speed with a Graflex or Zeiss Contax have oval wheels).