On Fri, 12 Dec 2008 22:25:35 -0600, Red Green
wrote:

Wrap it (near the ground) with two turns of detonation cord, fit a
proper blasting cap, stand back and push the plunger

Best suggestion yet.

You left out the Thermite option. (worth a watch) and cheaper.

http://www.youtube.com/watch?v=WrCWLpRc1yM