Watch Matthew Stafford entertain Lions fans from inside 'Can Cave'

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"Man caves" are well-established. "Fan caves" are picking up momentum. But credit Lions quarterback Matthew Stafford for being ahead of the curve on the next great concept: the "Can Cave."

Stafford is riding the wave of the best start of his career (his Lions are in first place and are 6-2, matching their 2011 start) by shooting a spot for Pepsi in a Detroit-area grocery store. He surprises shoppers from inside of an enormous display of the product - and surprises them even more when he invites them inside. Check it out (courtesy lions.247sports.com):