A group of tourists at Beijing Zoo in China were caught on video chucking rocks at a giant panda in footage posted to social media site Weibo.
The sanctuary in Chengdu is now home to 200 rare giant pandas.
Pandas are less passive than you might think, one park employee noted.
Seven out of nine captive giant pandas released to the wild since 2003 have survived the transition, China's state media said this week.
They're really bad at sex, they all belong to China, and more panda trivia.
In the video, panda keepers are seen repeatedly pushing, dragging and throwing the pandas away from the door of their enclosure.