Its true. Its Cane-Fu which teaches seniors some self-defense. It is now highly cropping in America due in part to "canes made of harder, thicker wood, to sustain wear and wider crooks to fit around an attacker's neck".
Now you can't underestimate seniors to be so vulnerable and helpless and defenceless. It'll be too bad for you if you would come up against a Jacky Chan-esque granddaddy. Haha of course I know you wouldn't!