jmanthorpecarleton (November 30, 1999 at 12:00 am)

Actually, spontaneous combustion is defined as combustion that requires not external heat to initiate combustion. Neither of these reactions were heated; therefore, they are, in fact, spontaneous combustion reactions.

totallyleafy (November 30, 1999 at 12:00 am)

what is the "solid compund on top here" said in 0:53 i need this for a science project, please respond soon!Im doing it on spontaneous combustion:P:P:Pawesome vid, btw...thx!-Nina^_^

jm2trash (November 30, 1999 at 12:00 am)

How is it spontaneous? He put flammable ingredients together and watched them burn. It's just combustion. It shouldn't have been called that.

sponpi999 (November 30, 1999 at 12:00 am)

Someone burning is spontaneous human combustion this is just spontaneous combustion

ny13isles39 (November 30, 1999 at 12:00 am)

you sick son of a bitch, why do you wanna see someone burn

Bonofreeman (November 30, 1999 at 12:00 am)

Very interesting test,very interesting teacher.But,it's not spontaneous body combustion.

flowercat101295 (November 30, 1999 at 12:00 am)

intresting..very interesting!

epicpolyphony (November 30, 1999 at 12:00 am)

Those are suppose to be impressive? they are just extremely exothermic reactions.. duh...

daf867 (November 30, 1999 at 12:00 am)

not alkaline metals

jmanthorpecarleton (November 30, 1999 at 12:00 am)

In order to have a fire you need to have a combustible material and an oxidizing agent (usually just the oxygen in air). In most cases you also need a source of ignition. The examples in the video don't need an ignition source. The combustible material in the first example is cotton. By adding water we generate heat and create a high concentration of oxygen gas. This causes ignition. The second example uses glycerol and a different oxidizing agent that will remain my secret.