When to go for a coinflip?

[vinyard]

I had managed to stay alive in this tournament despite a card drought up until this point.

And then I get AK and have to make a decision. That miniraise is super fishy and stinks of "I want action." I put him on A8+, 99-QQ (everybody seems to limp with AA and KK at 33) and some others. I think I am better than a coinflip but not much better and here's the question: Is this a pretty straight forward push back given my reads? I am not trying to back into the money & I have to make a move to accumulate chips. Does anybody fold this, does anybody flat call it or is the overpush to limit the pot (and possibly rely on the dope folding) the best/only play?

Party Poker No-Limit Hold'em Tourney, Big Blind is t100 (7 handed) converter

saw flop|<font color="#C00000">saw showdown</font>

MP1 (t1185)
<font color="#C00000">MP2 (t920)</font>
CO (t1195)
<font color="#C00000">Hero (t880)</font>
SB (t1240)
BB (t1025)
UTG (t1555)

Preflop: Hero is Button with A[img]/images/graemlins/diamond.gif[/img], K[img]/images/graemlins/spade.gif[/img].
<font color="#666666">2 folds</font>, <font color="#CC3333">MP2 raises to t400</font>, <font color="#666666">3 folds</font>, MP2 calls t480.

Flop: (t1030) 2[img]/images/graemlins/heart.gif[/img], K[img]/images/graemlins/heart.gif[/img], 5[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>

Turn: (t1030) 3[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>

River: (t1030) 3[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>

Final Pot: t1030

Results in white below: <font color="#FFFFFF">
MP2 has Qs Qh (two pair, queens and threes).
Hero has Ad Ks (two pair, kings and threes).
Outcome: Hero wins t1030. </font>