it's one thing to get involved if you are young and able. but in the story you are about to see, one of the unlikeliest of people says not on my watch. northampton, england. it's a bold and brash robbery in broad daylight as three sledgehammer-wielding thugs wail away at this jewelry store front. and three getaway drivers on mopeds rev their engines. it appears no one can stop these helmeted hooligans from their brazen afternoon heist. that is no one except for super granny. >> i'm exceedingly feisty. i know how to smack your hand if it's in the wrong place. >> reporter: her name is ann timson. and cloaked in red, flying down the street with the greatest of ease, the 71-year-old british granny vigilante decides to take justice into her own hands. beating the armed bandits with