I don't think "anger" covers it. There is hatred, frustration sure, but a frustration intensely focused, outwardly on Hillary Clinton, that is the hate, and inwardly focused, you can see him thinking, and those are dark, vicious thoughts he is thinking.

That is a man capable of violence, he has it in him, and in those four seconds is barely able to keep it in. It is a malevolent four seconds.

Donald Trump is a clearly disturbed man.