wow this is pretty sick overbet, i think i call my 3th nuts here but im not sure.
Just think its likely hes pretty random and can overplay weaker flushes cause the board is a straight, he may also overplay 6x or 67.

you can easily call it off here.he could do this with lots of str. and maybe a high flush.It's  likely with a very small chance he could even be bluffing with a Air considering how low the stakes are and how the opponent could be.

It's pretty much a no brainer call here.

P.S And if he did have AsXs,he would had bet the turn with a certain possiibility.

A is good turn card for second barrel 

Yeah, I used to hate this spot. The answer: it depends. Some guys do this with only the nuts or second nuts, some guys do this with any hand better than the made hand on the board (6's, lower flushes) and every once in a while a guy does this thinking he's bluffing you off a chop if he thinks you're the type to only call a huge over bet with the mortal nuts. So you need some reads. 

In the absence of reads, you play it against the general tendencies of the player pool. Trouble is, the player pool in the super-micros is SO diverse. Almost everyone is bad, but they're bad in so many ways. It would help tremendously just to have his vpip/pfr over even 50 hands. 

In this case, yeah, I think you should have barreled the A on the turn, because you can lay down to a big x/r. As played, I doubt he has any A, which means there's only one combo in the deck that beats you, so there are plenty of combos he could have to make it the right call mathematically. (You have to be right 46% of the time, and that's easy to get to if you're wrong against only one combo)

One other meta-consideration: If you call and you're wrong, you're no longer deep and in position with someone doing at least ONE thing stupid in this hand. If you just fold here, you're still about 165bb deep with him (and covering) and you have direct position for as long as you two stay at the table. Now, SOME guys only pull out this play if they're getting up the very next hand, but in most cases, even though I think it's an ok call, I think it MIGHT be long-term even higher EV to fold, keep playing deep and figure out what he's doing.

I dont like barreling the turn here. getting c/r would be a travesty, hes got every Ax he calls PF in his range, and if hes got mid PPs we can prolly just get him to fold those on the river when he checks to us, which is the main reason for barrelling the turn.

As played, its really tough, I can easily see him having worse flushes and there are a ton of those, he could also just be thinking hes getting you off a chop. I would just click call. Hell if he showed me a 6 I wouldnt be blown outta my mind. 

Sick. No way I could fold readless at 5nl though, far too many random guys just clicking buttons. Plus Axss should x/r that flop a tonne, I know he passive but even still. 

Thanks for the feedback guys, I've had 2 spots like this over the last month and I've folded both times. Maybe a little too nitty at nl5 but the reason I posted was this kind of action just so rarely happens at donk stakes.