A variant of the Turkey handshake
fail, where confusion between whether a handshake or a fist bump will be played leads to an accidental fist-palm. This new handshake takes that idea and doubles it, and makes it intentional. The first individual holds out a fist, the second person open palm
slaps the fist in a downward fashion; the second person then makes a fist, and the first individual
slaps the fist in a downward fashion.