Odd overbet 5/10 , make Hero call??

[fearless2k]

Game is 6 handed, have just joined room, no real reads on villian, although he seems a little spewy. . (sorry if this is hard to read i couldnt get the hand converted properly)

Seat 1: ($1,170.00 in chips)
Seat 3: ($1,256.00 in chips)
Seat 5: ($1,208.15 in chips)
Seat 6: short stacker ($138.75 in chips) DEALER
Seat 8: Villian ($1,282.25 in chips)
Seat 10: Hero ($1,000.00 in chips)
Villian: Post SB $5.00
Hero: Post BB $10.00 <font color="blue"> </font>
<font color="black"> </font>

*** HOLE CARDS *** A [img]/images/graemlins/diamond.gif[/img] K [img]/images/graemlins/heart.gif[/img]
P 1-3 fold
Shortstacker Min raises to 20
Villian Reraised to 50 in SB
i reraised to 160 (i considered folding but thought villian might have a wide range to reraise with here and i didnt mind isloating the shortstaker and taking down a small pot)
Short stacker thinks Then calls all in
Villian Thinks for a while then calls

Flop 6 [img]/images/graemlins/club.gif[/img] 5 [img]/images/graemlins/diamond.gif[/img] 2 [img]/images/graemlins/heart.gif[/img]
Pot is around 470 with around 6 dollors in a sidepot.

Villian insta shoves allin for 1.1k
I have 839 left... hero?

I was unsure of how i playd this and wanted to see what other players thought

My problem with how he playd it is, doesnt AA-QQ check raise all in? (he has to assume i Continuation bet a lot on the flop) any reasonable hand i.e set/weired 2 pairs or big pairs surely check raise all in to get more $$ into the pot.... this line didnt make sense,
Thnks