If I was villain and had AA then I would have raised pre. But this close to the bubble, maybe slow playing AA is wise as aggressive betting will likely just make everyone fold and you only collect blinds. Calling pre then just check/calling after making trip As means the villain is letting you fill the pot and not scaring you away.
If I was villain and I had JJ then I probably would have folded after the flop as that
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would have scared me away.
Anything smaller (25 or 75) and I would have folded pre.
If I was hero here and have the river checked to me and I'm on the bubble, I would check back - limit my exposure if the villain has me beat but also gain a healthy +20bb if I'm ahead.
But then again I'm a scaredy-cat...