It's A Defense Mechanism

 Whenever i feel pain and start feeling like crying, i tend to smile and laugh a bit while tears starts to fall down on my cheeks. That's why i'm calling it a defense mechanism. Each and everyone of us has our own way of hiding our true feelings. And i must say that each living thing has it's way to defend itself from everything just to survive. But for us human, it's our way to surpass and survive from the trials and tragedies in our lives.
 That is why a smile on a child's face is worth more than a thousand miseries.