Many of us have habits like cracking knuckles, stretching the neck, etc. But would you believe that such a common habit can become a cause of disaster for someone? For K-Lynn Felthager of the United States, stretching her neck proved costly. While returning from Walmart, she stretched her neck to the right to relieve work fatigue. Her neck made a 'crack' sound, and she felt an unusually sharp pain. Since the pain did not subside for a few days, she did not go to see a doctor. She relied on simple painkillers. Five days later, while applying makeup in her...