EDIT: This thread has become a wealth of information for beginners.  Please check out all the other posts by the community within this thread too. Most of us who have been riding for quite some time don't give it much thought as it has been incorporated into our muscle memory and have become second nature.  However, for a beginner, it is important to understand the physics behind balancing on a euc and to be actively aware of this until it becomes second nature and incorporated into one's mus