Knightsridge....The Super Rock?

Just dont know if it was the right play to make.

Game #3547276673: Hold'em NL ($0.25/$0.50) - 2007/03/21 - 16:56:01 (UK)
Table Seat 3 is the button.
Seat 1: me ($63.76 in chips)
Seat 3: ($20.90 in chips)
Seat 4: ($28 in chips)
Seat 5: him ($42.23 in chips)
Seat 6: ($48.70 in chips)
NoLuck: posts small blind $0.25
Nille20: posts big blind $0.50
----- HOLE CARDS -----
dealt to Emmap0611 [Qc Qd]
: calls $0.50
Emmap0611: raises to $2.50
: folds
: folds
him: raises to $6.50
: folds
me: calls $4
----- FLOP ----- [Jc 9s 2h]
Nille20: bets $14.50
Emmap0611: folds

In hindsight, he bet so much that it didnt feel like AA or KK. However, he had never showed any real aggression or got out of line in the time I played with him. It was THE only time he led out like that after a preflop raise, and he never, never, had reraised anyone that I saw. Wish I could have seen what he had.