The mass of that wood is not in your cup of tea. For example using E = mc^2, saying the sticks mass is 1 kg we have.
E = 1 X 300,000,000 m/s ^2 or more simply, E = 1 X 3 X 10^8 ^2
That equals
E = 3 X 10^16 joules
which equals around 7 mega tonnes of tnt
you can see how much energy is locked...