Loved the squirrel video! I noticed that one of the comments on You Tube said the squirrel was "planking." I'd never heard of this! So I Googled the term. Here's what I learned from Wikipedia:
Planking or the lying down game is an activity consisting of lying face down in an unusual or incongruous location. The hands must touch the sides of the body and having a photograph of the participant taken and posted on the internet is an integral part of the game. Players compete to find the most unusual and original location in which to play. The term planking refers to mimicking a wooden plank.

Sometimes it's so hard to keep up with these fads! But I guess your squirrel is in the know.
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Sandy Nachlinger, author of BLUEBONNETS FOR ELLY; co-author with Sandra Allen of I.O.U. SEX
http://sandranachlinger.blogspot.com