Hand 1 - What does he think you have and does he expect you to call? he probably puts you on an ace most likely and he probably think that you will fold an ace to that overbet on the turn, and rightly so.

So, why would he make this bet? it doesnt make sense, he is getting no value from your most likely hand so why would he do it with something like an 8 or a flush? UNLESS he thinks that you are thinking this so you call with an ace. It all depends on what he thinks of you and what level you think he is thinking on makes all the difference.

If you think he is thinking that you are thinking that then I'd say your calling range should be a flush or better as he would thinik your calling range would be wider so this is less likely to be a bluff.

He hasnt got Ax here as AK would reraise preflop and any lower aces would slow down on he turn. so its either a flush, 8 or bluff. my money would be on QJdd or something similar.

Hand 2 - If he thinks this is the table fish then he would almost certainly reraise a good hand in the first place as he expects table fish to overvalue his hands and call. His line makes no sense - I would call with 1010+ and AQ+