is this flatcall way too weak? NLCASH

[jsnipes28]

I think I made a kinda weak flat here just bc this guy had been running like god. i am not sure if I like it or not. hes pretty fishy, 45 got there was my biggest concern. i think i woulda shoved most other rivers. he essentially instapotted river

Full Tilt Poker Game #3606525600: Table Shun (heads up) - $5/$10 - No Limit Hold'em - 0:11:31 ET - 2007/09/19
Seat 1: BRISSYFISH ($1,588)
Seat 2: pez_vela ($1,501)
pez_vela posts the small blind of $5
BRISSYFISH posts the big blind of $10
The button is in seat #2
*** HOLE CARDS ***
Dealt to pez_vela [Kc Ts]
pez_vela raises to $30
BRISSYFISH calls $20
*** FLOP *** [Th 3d 6h]
BRISSYFISH checks
pez_vela has 15 seconds left to act
pez_vela bets $50
BRISSYFISH calls $50
*** TURN *** [Th 3d 6h] [Td]
BRISSYFISH checks
pez_vela bets $130
BRISSYFISH calls $130
*** RIVER *** [Th 3d 6h Td] [2s]
BRISSYFISH bets $420
pez_vela calls $420
*** SHOW DOWN ***