Bizarre oop spot ...against quads?

[cbboy]

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Hindsight -> 20/20 ...ghosts in the girdle...I guess.

I bet $100 on the River, he shoves, I fold.
He's just so passive, I had trouble seeing what worse hand he calls with on the River.

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If hes so passive, why do you have trouble seeing what he will call with? He will call with any pair.