2/4 AA Turn Donk Bet

[Ricks]

I am fairly new to the table and so is MP3. He posted in the BB at the beginning of this orbit and the only thing I have seen him do is CC in UTG+1. He then folded on the turn. The others have done nothing remarkable.

BB 40/2/5/ 300 hands
UTG 28/4/1.5 70 hands
MP3 no stats have come up on him

MP3 donks into me after the board pairs on the turn. Should I pop it or should I fear this bet and just call?

Party Poker 2/4 Hold'em (10 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

Preflop: Hero is CO with A[img]/images/graemlins/diamond.gif[/img], A[img]/images/graemlins/club.gif[/img].
UTG calls, <font color="#666666">4 folds</font>, MP3 calls, <font color="#CC3333">Hero raises</font>, <font color="#666666">2 folds</font>, BB calls, UTG calls, MP3 calls.

Flop: (8.50 SB) 5[img]/images/graemlins/club.gif[/img], 8[img]/images/graemlins/spade.gif[/img], 2[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(4 players)</font>
BB checks, <font color="#CC3333">UTG bets</font>, MP3 calls, <font color="#CC3333">Hero raises</font>, BB calls, UTG calls, MP3 calls.

Turn: (8.25 BB) 5[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(4 players)</font>
BB checks, UTG checks, <font color="#CC3333">MP3 bets</font>, <font color="blue"> Hero? </font>