OK seriously, what besides AA could he have?

[MrMoo]

Soss has this right.

If you can't fold this here, you need to do something other than push. If you push here, assuming he folds all but aces, you win 400 when you're ahead, and lose 1800 when behind. You can extract a lot more the times your ahead by calling. And even if he has aces, if the flop is scary theres a very small chance you can scare him off the best hand.

Basically if you're intent on going to the felt here, play it so you get the most chips the few times you are ahead of something like AK or QQ.