Maybe as a last resort to save myself from that 800 lbs bear that's mauling me when all 5 slugs from my Remington 870 fail to stop it. But I really can't think of any other uses for it, except as a normal knife.

Here's a video of the WASP knife exploding a watermelon.

http://www.youtube.com/watch?v=Sa_NC-_fvKs