When Karimul Haque's mother died because she couldn't get to a hospital, he swore no one else in his village of Dhalabari, in India's West bengal state, would suffer the same fate.

For the last 20 years, he's used his motorcycle as an ambulance and has saved more than 4,000 lives. People call him 'Ambulance Dada'.

On the show: Al Jazeera journalist Priyanka Gupta, who visited Dhalabari. Our host is Mohsin Ali.

Follow them on Twitter: @PriyankagIND and @mohsin.

Ambulance Dada is part of AJ Shorts - our short documentary series about ordinary people in extraordinary circumstances. Check them out: aljazeera.com/shorts.