This isn't the Tsuyoshi that he was so scared of his hair fell out and now he's kinda pissed that his whole life was upended by this unserious guy (ignoring that Teru put himself in this positon)I don't know whether to say he finally lost it, or finally regrew his balls and spine.
Definitely lost it. There is a VERY clear line between bravery and stupidity lol! This is like Yamcha trying to pick a serious fight with VegetaI don't know whether to say he finally lost it, or finally regrew his balls and spine.