Due to its long reach, a side kick is a very effective weapon in attack and aggressive defence. It can be aimed at the opponent's solar plexus, ribs and sometimes, the face. (Little 1997 vol 3)

" I demonstrated a sidekick on Ken Newtson a powerful Goju stylist that moved him so fast that he felt as though his eyeballs, were still where he was standing " -- Bruce Lee (Lee 1995 video)