It pays to look out for clever body language like wrist, arm, heel, and leg hooks, hip and shoulder scums, knee and arm bars, stems, hand jams, and even sitting positions.

• 需要注意找出灵巧的肢体语言，例如用手腕、臂、跟、及腿去勾，用臀部或肩膀去卡去摩擦，卡膝盖或手，劈腿似地把脚踢开，甚或使用坐的姿势。