Alright in tonights episode it was revealed that the invisible man had trained people before, who do you think it was? I have a few thoughts. So far nathan and DL are the only people who have total control over there power. In 6 months nathan seemed surprised when he flew, but in later episodes he seems to be in full control, maybe he had some help. DL also has a great amount of control over his powers and could have been trained. We dont know anything about the hatian's past, so it's possible he was trained as well. The invisible man sounded like people had gotten hurt or killed in the past so maybe he worked with claires mom as well.