Another edition of "You be the floor"

[BriMc]

This happened this weekend at The Borgata.

2 players are sitting next to each other and they seem friendly. One is a regular (all the dealers know his name, as do the other regulars), the other is not. They keep showing each other thier cards when one isn't in the hand, many people have asked them to stop.

The hand in question:

The regular makes a huge all in over bet heads up on the river, 2k into a 500 dollar pot. The player facing the bet flips over his cards, showing pocket 8s. And asks his opponent if he should call.

The board is:
5J777, suits not important.

The 2 players go back and forth chating about the hand for a second, then it gets quiet while the player facing the all in contemplates his decision. While he's thinking, the player next to the regular, sits back down and asks to see his cards, the regular shows them to him and he says, "oh man buddy, he only had a pair of fives, you should have called" Everyone at the table is like, stfu, the hand is still live! The guy says, "oh [censored], sorry, and covers his mouth". The player facing the all in calls immediately, and the regular tables Q7.

Floor is called, how do you rule?