NL50 SH trips vs river crai

[castor11]

$0.25/$0.50 No Limit Holdem
5 Players
Hand Conversion Powered by weaktight.com (http://weaktight.com/)

Stacks:
UTG ($58.50)
CO ($44.50)
BTN ($57.31)
SB ($52.22)
hero (BB) ($51.85)

Pre-Flop: ($0.75, 5 players) hero is BB :kc: :3h:
3 folds, SB calls $0.25, hero checks

Flop: :3s: :qd: :3d: ($1, 2 players)
SB checks, hero bets $1, SB calls $1

Turn: :6s: ($3, 2 players)
SB checks, hero bets $3, SB calls $3

River: :5h: ($9, 2 players)
SB checks, hero bets $9, SB goes all-in $47.72, $38.35 to hero ($38.35)?

Villain: unknown

Call or fold?

[tesla79]

Pff, I don't belive he has 24, 47, 36, 35...
Maybe he limps with: 55, 66, A3...and he would call OTF.
It's a crying fold I think (I also can't do it). :)

[Zseti]

I think river overbet push usually the nuts. I fold here.

[The teoszan]

I think that on this kind of board against an unknown player it`s a fold...on the river he won`t go c/r ai with air.I think most of the times he is super strong here so I would fold this.

[castor11]

I fold on river.