Binasuan
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The binasuan is a
pronation. Binasuan originated in Pangasinan
and is popular at festive events such as weddings.
Since the binasuan inverts the arm through rotation, it is sometimes given as a macroscopic, physical demonstration of the rotation properties of a
spin-½ spinor. As the liquid never spills, the rotation can all occur within the same plane. Upon a rotation of 2π radians, the elbow changes between pointing up and down. Upon a rotation of 4π radians, the palm "doubly covers
" the shoulder, and the elbow points in its original direction.
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