In this video, a squirrel defensively kicks up sand when it spots a rattlesnake. Other rodents instinctively kick in the face of fear. In the lab, rats kicked up their cage bedding when researchers tampered with certain brain chemicals.

Video courtesy of BBC & National Geographic, provided to Kent Berridge by Profs. D.H. Owings & R.G. Coss
(lsa.umich.edu/psych/research&labs/berridge/VideoIndex.htm)

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