Those were interesting times, Wadd.
I remember in 'Nam rolling C-4 into a long rope and making a coil of it about 4-5 inches across. You could light one end and cook over it, but the smell was awful. Used to freak out the new guy because they thought it would explode.
It's amazing to me these days how easy it was to get C-4, grenades, Tommy guns, M-2 carbines, AK-47s, and M3A1 "grease guns", and other stuff.