This is not always 88. I would do this to you as the villain with 55,66,77,88,99,78,98, but I don't play as tight
. If I was villian and had a set I just can't give you credit for the straight and even if you do have it I could still fill up to a full house on the river.
This could be a move with and overpair weaker than yours, but you just have to give him some credit and let it go. Big pots are made for big hands and you don't have one. That is why the turn check is so critical. The hollywooding by him should give you some tells for future reference.