If you've got the coin and a far out place to do it, Tannerite is the ticket. $100 gets you a case of 20 charges.
Don't do it anywhere near people or homes though. You should have at least a 100yard distance between the target and any people or structures. Its dangerous stuff, but very impressive. Like a stick of dynamite. As with any explosive device, be very careful and follow the direction on the package.