Jockey Sairyn Fawke won race two at Port Augusta on Thursday, but suffered a loss in the stewards' room.
Piloting Turf Man, who was sensationally-backed from $3 into $1.75, Fawke found himself towards the back of the 10-horse field upon settling down.
Passing the halfway mark in the 1400m contest, Turf Man did not appear to be travelling all that well, with Fawke doing his best to keep the favourite's mind on the job.
Spotting the leaders around seven lengths approaching the final bend, and desperate to get off the inside rail, Fawke drove Turf Man through a questionable opening at the 500m.
Fawke's vigour saw him cannon into $61-outsider It's Primose, effectively knocking that galloper out of the race.
South Australian stewards took a dim view of Fawke's actions around the home turn, finding him guilty of careless riding and suspending him for four meetings.