I glanced at a sign at a shop advertising 'free battery checks', but misread it as 'free battle cry checks'.
The image of a burly Norse warrior in armour offering advice to walk-thru customers came to mind, offering critiques on their own battle cries, with tips like 'scream from the abdominals', and 'for emphasis, swing your axe. Don't have one? Aisle nine'.
My Wife would love a shop like that.