For Mark, something blowing up is not only fascinating, but highly entertaining. Myth Busters is his favorite new show. It delights him especially when they are blowing something up.
Yesterday I saw this:
I showed Mark and he laughed. He howled. He gasped for breath. Nothing cheers me up like uncontrollable laughter, particularly from Mark.
So in addition to things blowing up, Mark enjoys a good joke about lighting something on fire.
(Also, I hope he stays away from the matches.)