What is the symbolism of the handshake between Ghost and Mr. Charles?

A handshake symbolizes both manhood and respect, and is a sign that Ghost has become a young man. The handshake is exchanged between Ghost and Mr. Charles – who is one of two shining examples Ghost has of manhood in his life – before Ghost’s first ever competitive race. The handshake indicates that, as Ghost is his own man now, his life is truly in his own hands – including what he will do with it.