Cemtex, C-4, How about some nice C-12. I can get you some of each from my dad, and send them to you fed-ex. I'll pre wire everything for you, so that all you need to do, is give them a little shake, and they'll be "Armed". Or maybe pressure switches, and I'll overnight them to you..Fedex Air freight... You can use them to make a crater, in your back yard, and just push the tree into it, and cover it back up with dirt.