Two Plus Two Older Archives - Got my Ace's cracked...

First time in a while. Wanted to get some thoughts on my play and the evil do'ers play. Second hand of a 10+1 SNG at Party, so stacks are basically even and the blinds are 10/15. I'm in the small blind with AA. Only two or three limpers to me(I know, hard to believe). I raise to 65 and all fold but the button, who calls. I don't have the hand history, but the flop is 3 5 7r. I bet 150 and get called. Turn is an 8. I go all in. He calls. River is a 9. I'll post the results in white.
<font color="white"> </font> He turns over 76o for the runner runner str8. At first I dismissed his play as really dumb, but then tried to look at the hand from his point of view. Assuming he tries to put me on a hand, what does my raise to 65 represent? Perhaps 2 big cards, AK or AQ? So perhaps he thought his 7's were good. On the turn he still has his pair and has picked up an open end str8. I think he assumes his hand is still good and I am trying to push him off it with 2 big cards. Or perhaps I am giving him too much credit. I didn't stick around long enough to see too many hands but he did manage to turn his T1500 to T1000 by the time I left. As far as my play, I was hoping he was also on two big cards, and perhaps too readily dismissed the str8. Flame away!