Incredible photos have emerged of a bouncy castle flying through the air at a race meet in Kalgoorlie on Sunday - fortunately with nobody aboard.

Amazingly, nobody was injured when the bouncy castle was torn from its moorings and tossed more than 300 metres from near the main straight at the Kalgoorlie-Boulder race meet.

There was a moment of panic when a Racing Gaming and Wagering steward dived into the inflatable castle and tried to deflate it with a rock when he saw what looked like a small child bobbing up and down as the inflatable took flight.

It turned out to be a "pirate figure" in the castle.

Kalgoorlie-Boulder Racing Club CEO Tim Beaver said seeing the Jump 4 Us Party Hire castle airborne was "very scary".