[citation][nom]WyomingKnott[/nom]Is the example in the first picture being bent by the person holding it, or was it heat-formed in that shape? A video or series of snaps might help prove the point.[/citation]
Probably being bent holding it. Regular glass is actually very flexible. It's the thickness which prevents it from flexing (the greater the thickness, the greater the elongation of the outer edge in a bend, and glass is very brittle when it comes to elongation). If you can make glass very thin, its flexibility really shows. Fiberglass and optical communications fibers are good examples of its flexibility.
My concern would be what the shards are like when it breaks. Fiberglass and optical fibers can be looped into a very small radius circle. But if you make the radius smaller (like tying it in a knot), it will fracture, and the ends are rather sharp. It is still glass. In all likelihood this will have to be coated with a plastic layer like car windshield glass to prevent it from shattering into a thousand paper-thin shards with razor edges.