Baby goat jumps, freezes and topples due to inherited muscle condition

A viral video that has received more than 5.4 million likes shows a baby goat jumping down from a small staircase before suddenly freezing with all four legs stiff and toppling over. Within seconds, it gets back on its feet and starts moving again. While it may look as though the animal has fainted, that is not what actually happens. The behaviour is caused by a muscle condition known as myotonia congenita.These animals are called myotonic goats, also known as fainting goats. They do not lose consciousness. Instead, they have a rare inherited muscle condition called myotonia congenita, which causes their muscles to become temporarily stiff when they are startled or make a sudden movement.The unusual behaviour has made these goats famous around the world.