1. Hold the leg to be examined in 20-30 degrees of flexion.
2. Place one hand laterally just below the knee. Grasp the leg near the ankle with your other hand.
3. Gently push with both hands in opposite directions to stress the knee.
4. If the knee joint "opens up" medially, the medial collateral ligament may be torn.
5. Reverse your hands and repeat the stress.
6. If the knee joint "opens up" laterally, the lateral collateral ligament may be torn.

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