According to Bangkok Post, that afternoon Stefan was feeding a bear that was in its cage. He reached his arm into the cage to give food to the bear. However, suddenly the wild animal bit Stefan's right hand. The animal, which was in the foundation complex located in Muang Ngai, would not let go of the hand of the man from Switzerland.

The condition was truly dangerous. Stefan knew his life could be at risk if his hand remained in the bite of the giant bear. Stefan took emergency action. He decided to cut off his arm using a knife to avoid the bear's attack.

"Stefan was immediately taken to Chiang Dao Hospital with his arm severely injured from the elbow down. The 32-year-old man was then transferred to a private hospital in Muang District, Chiang Mai, for surgery."

"Meanwhile, the condition of Stefan's severed arm was found to be torn apart by bites from a bear that was initially intended to be fed. According to reports, the Asian black bear that attacked Stefan was originally located in Doi Pha Daeng National Park in Chiang Dao, after having previously gone missing in 2013."