In the controlled arena whereby a large percentage of compliancy is administered, it would appear to the onlooker that martial art blocks are very effective indeed. However, in the scenario of a fully blown gratuitous physical assault, whereby no rules exist, would this still be the case? In reality how many times do you actually see anybody block at all? A street fight is usually complete mayhem and doesn't even get close to resembling how we usually train in the controlled arena. Therefore, my question is in reality are blocks effective?