What's the correct ruling on this situation?

[TxRedMan]

A player opened UTG for $15 in a 2/5 game. The BB defended.

Flop comes

Q-10-2 with two spades

BB checks, UTG bets $30, BB raises and UTG moves all-in and BB calls.

BB has Q-10, UTG has QQ. The action is sort of irrelevant.

BB turns his hand over, as does UTG. BB sees he's up against top set then picks his cards up and throws them forward face down about a foot in front of him. They never touch the muck. A player says to the BB "it could come spade-spade", and as the dealer turns a spade, the BB picks his hand up, pulls it back to him, and then the dealer turns over a river spade, making the BB a spade flush.

The hand never touched the muck, the dealer never touched the hand, but the BB did make a motion towards the muck.

What's the proper ruling here?