($55) Bubble JJ faces odd sized raise

[Doylestown]

Just got to the bubble. This is the first "odd" raise I've seen from villain. What could it mean and what's your play here?

PartyPoker, Big Blind is t150 (4 handed) Converter on pregopoker.com

CO (t1760)
Button (t3085)
SB (t1885)
Hero (t3270)

Preflop: Hero is in BB with J[img]/images/graemlins/spade.gif[/img] J[img]/images/graemlins/diamond.gif[/img]
<font color="red">CO raises to t800</font>, <font color="gray">Button folds</font>, <font color="gray">SB folds</font>, HERO?