We were playing poker with a few friends.
Once we were heads up, I went all-in. The other player said he's all-in. But didn't move any chips forward.
Right after that, he said: "Nevermind. I fold."
Is this allowed? I told him he might've gotten a reaction from me to make him fold.
But he argued that he didn't put in any chips, and that putting in chips is final. So I told him it's okay, as I don't know the rule. Based on his cards I would double up. In the end I still won though.