Strongest coffee ever!

The highlite of today's adventures in Saigon was a visit to the local drug dealer, I mean street side coffee vendor. Deep inside a narrow back alley, past the feral dogs, fresh fruit stands, hanging laundry and honking moto drivers, you will find a very serious vietnamese woman selling some very serious coffee.
Her operation is simple. Two tin coffee filters drip molten black coffee into glass cups, as if to proudly display it's remarkable opacity. Beside them is a plastic 1.5 liter water bottle with more of the rich black drug already prepared. Behind her is a small pyramid of sweetened condensed milk and a bucket of sugar. Beside her, a small iceberg.
With only a small amount of confusion Brooke managed to order an iced coffee with sweet milk (condensed milk) to go. I stand by curiously watching the process. About 1 oz of condensed milk, a couple ounces of sludge from the 1.5 liter bottle, about the same from the freshly brewed cups... stirred briskly. Then she grabbed a block of ice in her left hand, a crescent wrench in her right, and smashed the ice. Before I realized what she was doing there were shards of ice hurdling towards me. After the initial shock, I decided it felt rather refreshing.
The coffee was amazing, and after most of the ice melted it was still the strongest coffee I've ever tasted. No wonder this city is so fast paced.