William Buick was confronted at the race track by pal Joey Haynes before police were called.Cops were called for a second time by Buick, 32, who feared a man was parked in a car outside his £1.9million mansion.
The two riders, who weigh in at a little over 8st, clashed on Saturday in the 2.30pm race at Lingfield Park in Surrey.
Footage shows Buick’s mount Folk Magic, the 11-8 favourite but which finished fourth, shifting to the left.
It impeded the progress of Haynes’ horse, Artisan Bleu, a 250-1 outsider with one eye, which then faded to ninth place.