By Katie Evans
THE TERRIFYING moment a one tonne Great bison bull forced a hapless physician to flee and abandon his photographic gear has been captured.
Another image shows the spirited animal rolling around vigorously in the dust and dirt of Yellowstone National Park scratching an itch that just couldnât be reached.
![](https://mediadrumworld.com/wp-content/uploads/2018/06/MDRUM_BISON_STEALS_CAMERA-1.jpg)
Willis Chung / www.mediadrumworld.com
The animal can then be seen standing in the dust clouds of his own wallowing, looking menacingly at photographer Willis Chung (56) a physician from Denver, USA, as the bull readied himself to charge.
âThe bull rocked to its feet, snorted, and trotted over directly towards me,â said Willis.
![](https://mediadrumworld.com/wp-content/uploads/2018/06/MDRUM_BISON_STEALS_CAMERA-8.jpg)
Willis Chung / www.mediadrumworld.com
âI knew my best choice was to head 90 degrees away from the bullâs path, constantly changing my direction to keep moving perpendicular to the bullâs path. I went to my left, yelling âYea ha!â at the top of my voice and opening my arms wide to look bigger.
âThe bull steered off to the right and I continued to the left as we made a circle around the camera and tripod I had decided to leave behind.â
![](https://mediadrumworld.com/wp-content/uploads/2018/06/MDRUM_BISON_STEALS_CAMERA-7.jpg)
Willis Chung / www.mediadrumworld.com
Yellowstone, a 3,472 square mile park is home to around 5,000 bison, as well as housing bears, wolves and moose.
Although they may appear relatively docile, bisonâs can become very aggressive when disturbed and have the ability to run at over 30mph.
![](https://mediadrumworld.com/wp-content/uploads/2018/06/MDRUM_BISON_STEALS_CAMERA-5.jpg)
Willis Chung / www.mediadrumworld.com
Willis has been taking photos for the past 44 years and often frequents Yellowstone, but has never had an experience like this before.
âIt was never my intention to become an object of curiosity to the bull!
![](https://mediadrumworld.com/wp-content/uploads/2018/06/MDRUM_BISON_STEALS_CAMERA-4.jpg)
Willis Chung / www.mediadrumworld.com
âTaking 10-15 minutes to sit quietly invites the animals to come out and once they see me as part of the landscape, they often behave in surprising and lively ways.
âMaking sure I wasnât going to be perforated was my chief priority for a little bit. Once I got to a decent distance I was a bit shaky.
![](https://mediadrumworld.com/wp-content/uploads/2018/06/MDRUM_BISON_STEALS_CAMERA-6.jpg)
Willis Chung / www.mediadrumworld.com
âSome ask me what I did afterwards, which was take a long tea and lunch break and send thanks to whoever was watching over me from above!â
When asked what words of advice he would give to others in this situation, he said:
![](https://mediadrumworld.com/wp-content/uploads/2018/06/MDRUM_BISON_STEALS_CAMERA-3.jpg)
Willis Chung / www.mediadrumworld.com
âPlan ahead! Have an escape plan and be willing to leave your gear behind!â
For more information see www.mediadrumworld.com