Top set play

[nycplayer]

I figured if he had a good pair, he would then bet into me on the turn, and I wouldn't have to think about how much he would call. Instead, he checked (trapping me with his made straight), and I went broke.
I should have thought about his call. I expected him to put me all in, or to fold. The call should have alerted me to a draw, but even then I'd be thinking JQs, because he called a $50+ raise pre-flop. I didn't expect 78s.