Going upside down has the same instantaneous transformative effect as taking a dip in icy cold waters. Invert and soon you will arrive in the present moment, and thus can reassert the innate, undeniable power of authentic self. Go upside down and you will gladly drop your worrisome, debilitating concerns—these fantasies of the past or future will, at least temporarily, scatter and vanish.
This is why sirsasana (headstand) and sarvangasana (shoulderstand) are known, respectively, as the king and queen of all asanas. Among yoga postures (that are said to be too many to count), inversions do a benevolently uncanny job of waking you up—body and soul—to this immediate moment.