WTF hand

Full Tilt Poker $0.25/$0.50 No Limit Hold'em - 4 players
The Official DeucesCracked.com Hand History Converter

BTN: $104.50
SB: $35.25
Hero (BB): $66.75
CO: $23.60

CO posts a big blind ($0.50)

Pre Flop: ($1.25) Hero is BB with Jd Jh
CO checks, BTN raises to $2.25, 1 fold, Hero raises to $7.50, 1 fold, BTN calls $5.25

Flop: ($15.75) 9h Qh 6h (2 players)
Hero bets $10, BTN raises to $97 all in, Hero calls $49.25 all in
BTN is a LAG. I'm not quite sure what he hopes to accomplish here by shoving - I thought about it for a good couple of seconds before making the call. Doesn't my 3 bet pre-flop rep a pretty strong hand?

Turn: ($134.25) Jc (2 players - 2 are all in)

River: ($134.25) Td (2 players - 2 are all in)

Final Pot: $134.25
BTN shows 2h 2s (a pair of Twos)
Hero shows Jd Jh (three of a kind, Jacks)
Hero wins $132.25
(Rake: $2.00)