Horse jockey Christophe Soumillon was left apologizing after a seemingly scumbag move during a race on Friday -- appearing to deliberately shove his opponent off his mount ... causing him to tumble to the ground.
The moment happened at the Saint-Cloud racecourse in France ... when the Belgian star seemingly stuck his elbow out to force Rossa Ryan to lose balance and abandon his horse.
Ryan landed harshly and took several tumbles before coming to a halt ... but thankfully, he was able to stand up and get off the track.