Night Owl Cards

I know I am the last person on earth to figure this out, but somebody has got to tell me: how did they pull off this photo? I will gladly admit that I have no ability to decipher things like this. I suck at puzzles. I can't figure out the most basic magic tricks. I can't even see the 3-D effect when looking at one of those Magic Eye images . This card is a 1993 Upper Deck card of Mike Perez, holding a 1993 Upper Deck card of Mike Perez, which features Mike Perez, holding a 1993 Upper Deck card of Mike Perez, and so on, and so on, and so on . It's been featured on the blogs several times. Most recently it was on Dinged Corners. And someone was nice enough on that post to reveal the name for the phenomenon shown on the card. It's called lenticular something or other. I think. Maybe I screwed that up. I just tried searching for the post and couldn't find it. But the name isn't that important to me. What is important to me is the question I ask after every magic t...