85-Year-Old Grandma Dances Like A Boss At Seattle Rock Concert (VIDEO)

We're not sure what we love most about this video: a) this elderly lady's joie de vivre; b) the fact that she's dancing behind the stage; or c) her particularly epic move at around 0:47.

Either way, the sight of her dancing to Pickwick's cover of Elvis Costello's 'Pump It Up' is a joy to behold. And we can only hope we're this agile at her age.