passionate speaking

When someone is very passionate and enthusiastic about the point they are trying to put across. Often putting their hands on your shoulders and shaking the life out of you as they speak. They (without noticing) use A LOT of aggressive hand gestures, but then notice they are doing it as you start to imitate their movements. This "passionate speaking" may include a certain amount of sarcasm and can be found quite humorous by those who understand it. True naturals at "passionate speaking" can even convey their gestures and feelings quite miraculously through text. Ones may even say it's as if they can feel the glare from the person through their text. For highest quality of smiles and laughter it's best witnessed in person.

A "rational explanation" for unexpectedly changing your voice's volume when talking about a topic which you are "passionate" about. It can be mistaken for anger but it is hard to tell the difference