An interesting effect

I happened to found this video online.It is use a CD and fire to make a multi-color effect which look like digital effect.It is creative,the medium is important part of it.And I found it is interesting that when you found some effect is make of simple material,you will feel amazing,but if it is only   projective effect,you maybe will think it just common effect.Some time the material and the way of making art is changing audience’s comment and reaction of this work.