AK raising into a shortie. Is this a donk play?

[youngin20]

Is this a terrible call? I think his range is probably 99+, AJs+? Or is this spew?


PokerStars No-Limit Hold'em, $1.00 BB (9 handed) internettexasholdem.com

CO ($270.40)
Button ($163.80)
Hero ($120.10)
BB ($20)
UTG ($100)
UTG+1 ($117.50)
MP1 ($106.25)
MP2 ($57)
MP3 ($43.25)

Preflop: Hero is SB with A[img]/images/graemlins/spade.gif[/img], K[img]/images/graemlins/club.gif[/img].
<font color="#666666">4 folds</font>, MP3 calls $1, <font color="#666666">2 folds</font>, <font color="#CC3333">Hero raises to $4</font>, <font color="#CC3333">BB raises to $20</font>, MP3 folds, Hero calls $16.