[GGG65]

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My main problem with this hand is that it doesnt make sense for him to not raise the turn but then go ahead and shove the river. That seems retarded w/ just about any hand he can have.

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I could see the call on the turn if he thinks he has it - maybe an AK-clubs, or maybe he was trying to steal blinds preflop with an A8 and got lucky. Either way, he could be hoping to get one more shot out of the hero on the river - when he was checked to, hey, the pot is big, why not push and make it look like you might be trying to steal it away. A raise on the turn could lose him the chance to get more out of the hand.