[dmmikkel]

Since when did pushing A2 become a bad idea?

your ace reduces the chance of someone calling with another ace.

I'd push A2 against a loose caller because my ace will almost always be infront and in the bubble there's usually not time for waiting for a better ace or a high pair.

I'd also push A2 against a tight opponent because he's going to fold anyway.

In the bubble you shouldn't worry too much about being called, because the caller will almost always have you beat anyway. It doesn't matter if you push AT or A2 if he calls with JJ