Wash the pineapple. Discard the bottom and remove the top, reserving it for decorative purposes. Quarter it the long way. Separate the edible part from both the core and the rind, leaving a thin amount connecting the core and rind on each end. With a little wiggling the entire edible part should be able to move relative to the husk (you should be able to remove it in tact, though you will not do so).
Now slice that bad boy and push alternating sections out in opposite directions to make it look fancy. Serve.
Modeling here with the finished product is the always charming Chris. Photos stolen from Andy.