Yep, I think it's true - there is an other way to hack damage.
Some "better" screens from the topic:

This guy is from my country, we talked to him on our forum - he told that it's true. He even said, that he can show us this hack on a Training Dummy, but it will lead to an instant ban
Also, as other peoples, he didn't wanted to say us "how-to-do-it".