While recently in the United Kingdom, I spotted the Spider-Man 2 movie logo branded over all sorts of merchandising. I could refuse most, but when I noted that Kelloggs was giving away a 3D prismatic Spider-Man card "FREE" in every box of their cereal-and-milk breakfast bars, I somehow ended up with half a dozen boxes in my trolley by the time I hit the checkout.
The bars themselves were disgusting! With nearly four dozen of the darned things, I ended up munching as many as I could handle, giving a whole heap away to various children I had floating around the place, and managed to hide at least a dozen in my host's kitchen pantry and left them behind when I left the country. What's worse, for all my gastronomic misery I somehow managed to score only three of the four cards in the set!
Still, they're great cards. You can see more about them on our 2004 Kellogg's Spider-Man Prismatic card set page, which is part of our ever-increasing Spider-Man Trading Cards page.
Edit: I finally managed to get hold of that last Doc Ock card, so my set is complete now.