[CSuave]

The intent of the caller was to muck his hand.... it was not to flip them up... He threw them towards the dealer not trying to flip them up on the table. One of the cards actually exited what is consider the playing area of felt and went into the chip rack which is considered in many places to be off the table.
You are correct that both hands are to be shown during an all in where no more action can take place but if a player wishes to kill his hand that can be done so and then expose the hand. The callers intent was to fold. The dealer prevented it by turning the hand up. At no time is a dealer or other player to touch a live hand and turn it up, that is the responsibility of the player of the hand. The dealer could have instructed the player to turn over the hand but the dealer should not have turned it over without killing the hand first.