You wrong. As a matter of fact NOS is flamable and combustable. Just not in its liquid form. Say for instance, you use all your NOS, that means in the tank the gas reminants of the NOS remain. Much like that of the fumes of gas, it is highly Flammable and combustable. So in fact we are both right and both wrong, just half and half. Also, per a chemistry basis, NOS is Nitrogen and Oxygen. Oxygen in if pure stat is flammable as hell and if you know anything about welding, if pure oxygen is mixed with oil or grease of anykind, it will combust. Also you have to think the fact that the bottle is pressurized, if it gets punctured, it will explode. Now NOS is an additive into a combustable fuel system, therefor NOS itslef will contain combustable componets to even be able to be used. You need to read up on your chemisty and not your movies. Also you need to refresh in physics. Now even though the bottle says non flamable, it honeslty can be if used improperly, so it is fully probable and possible that it can cause the damage i said.