How to Chunk a Pineapple Like a South Seas Island Boy - Instructables - DIY, How To, food - Annotated

Island Boy Tip: Please be careful when using a knife for any purpose. You must respect the blade. It can cut you.

I highly recommend not following that tutorial.  The first comment, second link, to an about.com page, is far safer for the average home cook.  Anytime you are not keeping a flat surface on your cutting board, you are asking for stitches.  Specifically step 11, which I'd bet one out of every 4 people who try it will wind up with a cut of some sort.  If an "island boy" were to be working for me using that technique, it'd be a short lived experience on their part.

I'd also argue that follow the about.com link would result in less waste, as you can control the amount of the outer "skin" being cut off.