I Lift the Knife and Chop It

"Do you know the section where Sun Wukong holds a watermelon knife and cuts through the east gate from the south gate?" "Is there this part of Journey to the West?" "Then do you know Sun Wukong?" "I know" "Then do you know the watermelon knife?" "I know it too" "I was the one Sun Wukong took back then." "Huh?"