25-year-old Usha trains women in her 'Red Brigade' group in self-defence practices against abuse and other forms of exploitation.
"Usha Vishwakarma from Lucknow, UP fought back abuse and formed a Red Brigade of young girls, trained them in the art of self defence and wanted to form an Academy by the earnings at KBC to teach and arm those oppressed and suppressed women in the country to give it back to the invader .." the 71-year-old actor wrote in his blog.
"...Inspired really by the true story of the fiery young lady that came on with Priyanka Chopra to KBC in our special programme called 'Housalebaaz'..., Bachchan added.