Assuming this is a genuine video (it seems to be), what's going on here? http://h6img.com/g/11/scortching-summer-ahead-beat-the-heat-9.gif [Broken] He seems to blow a bubble from the respirator, which somehow forms a stable torus-shape and is able to propagate forward through the water. Does this have a name? Under what circumstances is it possible? What is holding the torus together, besides surface tension?