Reminded me of how in India we used make puffed rice for festivals at home over hot sand. Freshly harvested rice is dried in its husk until completely free of moisture. Then a wide mouthed clay pot half full of sand is heated and when the sand is really hot the un-hulled rice grains are dropped in. With the heat they pop out of their husk and puff up. Before they can burst out of the pot, they are lifted out with a perforated spoon that allows the sand and husk to skip through and neatly separates the puffed rice. Puffed rice looks like small white translucent popcorn. It is light papery and very fragile.
So too is the fact that the puffed grain is invested with significance.
Puffed rice plays a symbolic role in Hindu weddings. The ultimate witness to the union is the sacred fire and one of the main rituals is saptapadi or the seven steps taken by the couple together around the holy fire. As they walk around the fire, the couple pours handfuls of puffed rice into the brightly burning fire as a sacred offering; rice in all its forms is considered holy and is revered.