Brief shot of man in red jacket flagging down cars at Mosport racetrack. FOLLOW SHOTs of several cars driving to a stop, spectators in foreground. Several LSs and telephoto shots of race cars speeding along on winding racetrack. Several shots of racing cars on track, in groups, individually, from afar and from CU. Shots of red jacketed flagman in action, of cars making pit stops. Sequence showing cloud of dust caused by car going off track, driver staggering through cloud of dust, track officials moving about, keeping an eye on driver who seems to be all right. Shot of race car in awkward position against far side of ditch. PAN from men replacing bales of hay to cars racing by. Other shots of cars during race.