bodog $200- what to make of this huge overbet ?

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3rd level, first hour. no reads. my stack t2600. villian has t4500. starting stacks of t2500. blinds 30-60.

villian from mp limps, sb calls and i check the bb with A2 spades. flop is (A,5,7) with 2 hearts. sb checks, i lead for t130, villian calls and sb folds. turn is (2) of hearts putting 3 hearts on board. obv not a great card for me. i decided to check to keep the pot small with the intention of calling his bet, i also thought this would confuse him of my hand strength. he then bets t900 into a t440 pot. wtf? [img]/images/graemlins/confused.gif[/img] was my turn check horrible? and what do you all make of this bet? thanks for any all comments.