"Occasionally when 2 physical attacks touch, they clash. When a clash occurs purple lightning will appear on screen and a clapping sound can be heard. During a clash, both you and your opponent's attacks are negated, and you each can CANCEL your attack into another attack at no cost (but not a jump, dash, block, etc.). If the clashed move has mulitiple hits and you do not cancel your attack, the latter attacks will come out."