Im starting a short journal series called "Words of Wisdom". Its an irregular series of entries where I provide the situation, what was done wrong, and how you can avoid the same mistake. If you never made this mistake then good on you ^_^
When you say "do it like this" and trying to convey something visual with a physical motion but no one is looking at you, then they cant see what you're doing.
Word of Wisdom: Get their attention first so they can see you doing whatever you want them to see.