EARTHWORM TRACTORS (USA)
(69 min; 1936; b/w; English)
Director: Ray Enright

With Joe E. Brown, June Travis, Guy Kibbee

Alexander Botts is a self-described natural born salesman and master mechanic, who is trying to make a big sale of Earthworm tractors to grouchy lumberman Johnson. Since Botts doesn't really know anything about tractors, and since the old-fashioned Johnson is opposed to tractors of any kind, it isn't going to be an easy sell. But Botts perseveres, encouraged by Johnson's daughter. 

The film has some amazing sequences that make viewers wonder how they were executed especially since special effects technology was not that well developed. The first one involves Alexander Botts giving the prospective client, Sam Johnson a demonstration and we watch the tractor practically destroy everything in sight! 

https://archive.org/details/Earthworm_Tractors_movie
or
https://youtu.be/zk12-PZKtg0