Posted on Wed Aug 3, 2011 03:20 PM PDT
Hugh Hefner is jumping on the planking trend, and not sure about you, but we think the 85-year-old Playboy founder looks a bit stiff.
Hef's girlfriend Anna Sophia Berglund, who posted the above pic, also Tweeted: "I got Hef to plank!" Ok, now wake him up!
See some of the bunnies getting into the action ... after the jump.
Thumbs up, indeed.
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