Vietnamese swimmers ferry passengers across flooded rivers in plastic bags

https://www.youtube.com/watch?v=nznzIFR51gY

When remote areas of Vietnam are flooded out, entrepreneurial swimmers set up informal ferries in which passengers climb into sturdy plastic bags and are then swum across the river against the current. The Vietnamese explanation accompanying the video is beyond Google Translate, but I'd love it if anyone out there could help flesh this out, because it's pretty amazing.

(via Kottke)