This trick is pretty sweet. It's clear he uses a force. The Houdini trick deck uses the same principle for forcing a card. The bit with the glass shattering was such a good touch.. Wonder if that can be bought
I've never seen it offered. Apply a little science and it's not impossible to work it out. Create a glass-like card, thin and loosely adhered to a real card. The force is achieved using a variant of the trick called "Get Sharkey", sold by Card Shark in Germany - it allows the forced card to seemingly vanish from the deck.
Without giving too much away, the force I'm on about is part of the Houdini deck trick with the handcuffs that you feed through a hole. Those who own it know what I'm on about, there's a little snap you here when you riffle through the cards, that's the cue to stop.
Also, I believe the trick is a variant of David Harkey's "Petrified" which can be found in his "AH-HA" book
"Get Sharkey" - again, without giving away the full-blown secret - uses a principle very much like the Svengali deck, but does so in a very clever, different way that allows for making the deck searchable. The force cards in that deck never appear when the deck is searched, and unlike a Mirage or Invisible deck, there's no roughing spray used. The cards simply "aren't there".
Riffle-forcing a card is the easy bit. Making the card appear to no longer be there after the force - that's the hard part. But as I said, there's ways to do it if you get creative.
The card that shatters is the harder part, though it's not impossible. Obviously there's something glass-like on top of a card that conceals the card and makes it appear to be a different card. Candy glass would be a strong contender - it's cheap, safe and can actually be made in the home; it's essentially a very clear, shaped piece of rock candy, you could eat it if you wanted to. The glass in this case doesn't need to be clear - it needs to look AND feel like the surface of a playing card, and it needs to be exceptionally thin. Remember, in the trick the prediction card is held by a spectator face down, meaning the "glass" side is in contact with the skin of the spectator's hand. There's probably some form of light coating on the card to create the pasteboard look and feel on the card's face - the back is simply the back of the actual force card, the "real" prediction card.
It's a damn clever trick. Some of the best magic out there uses some pretty cool science.