"most people disconnect their tongue from the roof of the mouth while exhaling through the mouth,breaking the circuit of chi flow.."
My instructor does a chi gong exercise where he disconnects his tongue from the roof of his mouth on the exhale. He says this drops your energy. Don't know the details though.
Big egos are fragile.
Where the violent see only violence, the skillfull can see skill.
"You cannot solve a problem with the same level of thinking that existed when it was created." Albert Einstein