Two bluff-raise hands (15/30)

[Sintax]

I think the second hand is just chip dumping. If he has it out for you, there is NO way he is folding anything here; calling is ok if you think don't respect him at all.

The first one is better but you have to know this guy is capable of folding marginal hands. If he completely missed he will probably call then fold on the river to a bet. You won't have to improve to win.