So, in Tekkit (Modpack for Minecraft if you didn't know) there is an exploit where you can grind Blaze Rods into 5 Blaze Powder. Now Blaze Rods have an Equivalent Exchange of two Blaze Powders naturally, so you can convert the 5 Blaze Powders into 2.5 Blaze Rods then grind them back and repeat.
IT's an endless exponential growth that is good for getting blaze rods.
I started it about 10 minutes ago and I've got two stacks of diamonds, I think it might be too powerful.