1. Cut off bottom.
2. Cut into the pineapple from its bottom, as close as possible to the skin but not too close to include the little black thorns on the inside.
3. Use the knife to penetrate the side of the pineapple, thus cutting the core, which is the only thing holding the slides together.
4. To take it out, stab the piece that you cut with an angle, and lift. Enjoy!