I wouldn't be calling a reraise from early position with ATs if I was going to fold when I hit a dream flop like this!

You only really have to worry about what the big stack is pushing $270 with - and the chance he's doing that with TT when you have a T is miniscule. I can't believe you putting anyone on TT! The chance he has got a set is very small. The chance he has AA considering you have an A is also quite small. So I'd be putting him on KK at best - making you a slight favourite over him.

I'd be calling in a heart beat. But I suppose you could argue that if the big stack is playing really badly, you could wait for a less marginal spot to put your money in. But if you've seen him make any similar crazy moves like the 69o shove, then it's a really easy call.

Anyway, usually limp-calling reraises from early with AT is just donk play.