Attack of the Cumulonimbus clouds in Cavite

Spotted this gigantic cumulonimbus clouds formation in Cavite, we saw this while we were on the road to Manila. Awesome sight and I think its our first time to see this cloud formation here, and then after a few days, Manila experienced a smog attack and many people thought that it was some kind of fog, and after that they learned from the news on tv that the fog is a toxic fog from our pollutants such as factories and vehicles.