One thing most men do is learn how to ride a bicycle at an early age. After a few spills and bruises, that impossible mission is conquered and lead to more difficult tasks.
So, the next progression will naturally be motorcycles. And that when the complexity comes to light. Constantly watching out while both your hands and legs are occupied to keep the vehicle moving. Once that is conquered, one feels he is the king of the world.
But wait a minute. Think back. How difficult is it going to be riding a bike now? It would be a piece of cake. But, can one ride a bike with a very minor change? A change that will make you un-learn all that one has learnt over the years and start from scratch?
How about turning left to steer right and turning right to steer left? Will the human mind be capable of learning something like that? Will kids be able to learn that quicker than an adult? Let's find out something new about the human brain: