Thanks for your replies. I was the novice UTG player, I did go all-in, and MP-2 called with AK. My set held up, but I didn't love my line and I knew there were some problems with it.
I guess I chose such a high pre-flop bet because JJ has been a trouble hand for me and I wanted to discourage a re-raise. I also hated my position.
When the flop came, I knew I had to assign some likelihood to his holding AA or KK. I checked rather than bet because I thought I might get some additional information about his hand. As soon as he bet, I realized that I learned absolutely nothing
. It could have been a c-bet (likely), semi-bluff (reasonably likely) or even a stone-cold bluff (unlikely, but not out of the question after my check).
I convinced myself that he didn't have AA or KK because he probably would have re-raised pre-flop with those hands, particularly given the fact that there were 7 players still left to act. But I knew I didn't do myself any favors by giving him an option on a free card, and reading your post makes me realize that the wrong turn card (of which there were a bundle) would put me in the position of praying for a check-down.
Maybe I'll self-impose a moratorium on CRAI until I've learned how to properly use it
.