One player goes all in one player remaining the player turns his hand over before calling to try get a reaction out the player that has gone all in is this allowed
It is against the rules. You cannot even announce your card(s) when the hand is live.
What I have seen with inadvertent is they can only call or fold. They cannot bet out or raise.
To award the hand is extreme. It would be like a 1 orbit penalty.
There are dealers and floor men on this site that will hopefully weigh in.