This is just the weird power-play kind of stuff CEOs and Presidents pull with people.

He probably thought you were going to be a little kid.

As a result, he had a whole routine planned in his head of how he was going to interact with a little kid.

Then, as is typical of control-freaks he became angry when you were presented to him because you were almost 20, and something different from what he was expecting (a child).

As a result, he took it out on you because you "surprised" him just because you didn't jibe with the age group he thought you would be.