Sick River Stars Freeroll

Who would have caled the river bet ??????

PokerStars Game #16848031458: Tournament #84311852, Freeroll Hold'em No Limit - Level XIII (800/1600) - 2008/04/19 - 16:52:07 (ET)
Table '84311852 9' 9-max Seat #9 is the button
Seat 1: Kicksgood (6650 in chips)
Seat 2: pokerkatps (83125 in chips)
Seat 3: ehrimen (59436 in chips)
Seat 4: tonhu (15207 in chips) is sitting out
Seat 6: c1420 (6175 in chips)
Seat 8: Nuno1507 (27126 in chips) is sitting out
Seat 9: casssssssss0 (72645 in chips)
Kicksgood: posts the ante 150
pokerkatps: posts the ante 150
ehrimen: posts the ante 150
tonhu: posts the ante 150
c1420: posts the ante 150
Nuno1507: posts the ante 150
casssssssss0: posts the ante 150
Kicksgood: posts small blind 800
pokerkatps: posts big blind 1600
*** HOLE CARDS ***
Dealt to pokerkatps [As 9s]
ehrimen: folds
tonhu: folds
c1420: folds
Nuno1507: folds
casssssssss0: calls 1600
Kicksgood: folds
pokerkatps: checks
*** FLOP *** [3c 6h 5c]
pokerkatps: bets 4800
casssssssss0: calls 4800
*** TURN *** [3c 6h 5c] 7♥
tonhu has returned
pokerkatps: bets 4800
casssssssss0: calls 4800
*** RIVER *** [3c 6h 5c 7h] 4♠
pokerkatps: checks
casssssssss0: bets 61295 and is all-in
pokerkatps: calls 61295
tonhu is sitting out
*** SHOW DOWN ***
casssssssss0: shows [Ac 8h] (a straight, Four to Eight)
pokerkatps: shows [As 9s] (a straight, Three to Seven)
casssssssss0 collected 146840 from pot

I would bet alittle more on turn card than 4800 again but I dont no why he was in hand after flop thou.

IMHO, you had met up with a player with a similar playing style to your own as by what cards you both hold.

by turn they had hit straight draw and would have gone all in as he was playing really loose. prob should have bet more on flop