I absolutely do know, you're getting someone better at balancing on a log, which has absolutely no transfer to anything else. Oral cavity, feel, foot chi etc. and all that other **** you say mean absolutely nothing and have no relevance to anything. An intelligent person can admit when they're wrong and build on ideas, be humble and educate yourself S****.
Why does it matter if anyone else can see anything? You're getting a guy rolling around on objects. It's your job to explain why you're doing something so out of the ordinary and why we should care what you think it develops. Personally I agree with DW, it's a waste of time. Maybe you can prove otherwise... that'd be a first.
You're talking about things that are only relevant to clinical populations who have problems with their visual, vestibular or somatosensory systems. Standing on a log is doing nothing for an athlete and has no transfer to anything, that fact remains. You still cannot seem to understand that there is a massive difference between clinical populations and healthy populations, never mind competitive athletes. You cannot apply the same rehab principles to an athlete who is healthy. Educate yourself you stubborn old fool.