If you keep it warm enough. The time fuse going from the lift charge to the break charge is essentially black powder in a tube, and the fuse to the lift charge is a cord impregnated with black powder inside a paper sleeve (Quickmatch) on 1.3 G shells, or a length of very fast green fuse (also basically black powder) on 1.4 G shells.
You’d want to remove the lift charge. I said “If you keep it warm enough.” because I suspect that the heat released by the fuse would be less than the heat necessary to get the next bit of fuse warm enough to ignite. Forgive me for totally forgetting the technical terms, I’m up a bit late.
The easiest way would be to suspend it above a bucket of N[sup]2[/sup] (l) so that it would drop when the time fuse was lit.
If you just want the nitrogen to explode, though, it’d be easiest to fill a 2 liter bottle with it, cap it, and toss it into a body of water. Enough nitrogen will vaporize that the bottle will burst, and then all of it will vaporize from hitting the water.
pierre, have you ever dropped water onto a very hot pan or griddle? The water on the bottom of the droplet will vaporize, and you get a little hover craft of water floating on a cushion of steam. If you have a big enough glob of water, and a hot enough pan (cast iron works well), you can get it to skim around for a few minutes. For liquid nitrogen, the floor is hot enough, so a cup full tossed across a floor will skitter around until it’s all vaporized.
It’s why you can lick your fingers and put out a candle, or lick a finger and test the temperature of an iron or pan. It’s also why you can dip your hand in water, then briefly submerge it in molten lead.
It’s not why people can walk on hot coals, despite what some people say or what Cecil originally thought.