Sam o nella's way of describing what happens when somethingquickly deteriorates in value or quantity.
Sam o nella: "It dawned on people that these pieces of paper wouldn't be useful in a pile of wet tea and smoldering patriots, causing their value to do one of those horny eagle death spirals"
This is a sex act in which a couple are having casual sex in the doggystyle position then just before the man climaxes he pulls out, stands up, spreads his arms as wings, and caws as he releases onto the woman.