Okay, I am a total fan of Richard Feynman, but too bad he was alive before my time. According to what he says, I can assume that a piece of wood can "spontaneously" combust if put into a container with pure oxygen then compress that container. So in doing so, the volume of the container would decrease while the pressure increases. So as the pressure increases the kinetic energy of the gas molecules increase since the work is done on the gas. Then would the wood catch on fire? Is that how it works?