Have you ever wondered as to why the strongest land mammal on earth, the elephant, which can uproot a tree as easily as you and I, can break a toothpick, remains tied down by a chain tied to a flimsy peg?
This is because, when the elephant is a baby, the elephant trainer puts a cuff around the baby elephants leg and chains him to a heavy object. The baby pulls and pulls on that chain. The chain bites into his leg and causes pain as it starts to bleed and hurts him. It takes less than 2 months for the elephant to believe, that as long as that chain is on his leg, he cannot break free and can go nowhere. It is commonly known as the elephant chain syndrome.