Another I Think my KK is Beat Hand

Pretty much just sat down and have never seen this guy before.

Texas Hold'em $1-$1 NL (Real Money), #1,415,825,779
Table Filmeditor's HE, 26 Dec 2006 4:26 PM ET

Seat 1: zerser2000 ($25.20 in chips)
Seat 2: Galapogos [ KC,KH ]($97.50 in chips)
Seat 5: Oleg 20 ($25.40 in chips)
Seat 7: guenss ($85 in chips)
Seat 8: Champion115 ($63.75 in chips)
Seat 9: jaicus ($202.15 in chips)
Seat 10: Dagen x ($128.50 in chips)

ANTES/BLINDS
zerser2000 posts blind ($0.50), Galapogos posts blind ($1).

PRE-FLOP
Oleg 20 folds, guenss folds, Champion115 folds, jaicus calls $1, Dagen x folds, zerser2000 calls $0.50, Galapogos bets $5, jaicus calls $5, zerser2000 folds.

FLOP [board cards 6S,4S,8H ]
Galapogos bets $10, jaicus calls $10.

TURN [board cards 6S,4S,8H,9D ]
Galapogos bets $25, jaicus bets $186.15 and is all-in, Galapogos...

What does this mean? To me it meant he improved on the turn into a better, yet somewhat vulnerable hand (2 pair??) What could he be playing though that I should be afraid of here? Or am I good enough to call and take this pot down?

if he s not a donk and not out-of-line aggro you re usually beat here

Calling the flop bet and then raising on the turn seems consistent with a set as does his play pre-flop.

9/10 times your beat here. cry and fold

Golden rule: Don't go busto on pairs