I have used C-4 as a fire starter with excellent results - it burns like Sterno, just hotter.
How does one obtain C-4? I've heard of some people cutting open Claymores or melting it out of opened grenades, but that's too much work (and maybe a little dangerous) not to mention damaging good ordinance. It's far easier just to pull a M112 stick out of a satchel charge (M183), cut off a small slice, and put it back. You get to start your fire and keep your ordinance.
Don't try stomping the fire out though, or you could lose a leg.
All out of satchel charges? I guess you could use a little Sterno, but where's the fun in that?
If you want to start a large bonfire, there's always napalm... but that's another story. Ran out of Napalm? You can get some more here:
http://www.napalm.net/ j/k
