$100nl weird preflop play, whats his range?

[1gotth3nuts]

In 16000 hands at $100nl ive never had this happen to me preflop..

What do u think he has and what should my line be?

PokerStars No-Limit Hold'em, $1.00 BB (5 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

Hero ($106.45)
BB ($78.45)
UTG ($91.95)
MP ($106.15)
Button ($97.40)

Preflop: Hero is SB with A[img]/images/graemlins/club.gif[/img], K[img]/images/graemlins/spade.gif[/img].
<font color="#666666">1 fold</font>, MP calls $1, <font color="#666666">1 fold</font>, <font color="#CC3333">Hero raises to $5.5</font>, <font color="#666666">1 fold</font>, <font color="#CC3333">MP raises to $16</font>, Hero

[1gotth3nuts]

oh, and he just sat down... so no reads

[pokerOpus]

u seriously have never been limp reraised before?

fwiw this play is usually a big hand