A man is in a critical condition after falling off a horse at Centennial Park this morning.
The 50-year-old man went into cardiac arrest after the accident, according to a NSW Ambulance spokesperson.
It is understood that the man had left Centennial Park and was on his way back to the Centennial Parklands Equestrian Centre on Lang Road.
Witness Sandy Rogers told Hit that the man appeared to be in distress.
"I ran over and was the first person on the scene," he said.
"I helped the man into the recovery position and took the horse to the side of the road before helpers came and started CPR."
The man has been taken to St Vincent's Hospital by paramedics.
The horse has been taken back to his stable and is not believed to be at fault.