I am glad that Spontaneous Combustion – http://www.bbc.co.uk/news/world-europe-15032614 isn’t really that common.
Can you imagine what would happen if it was? You might be in a meeting and someone who wasn’t getting their way might burst into flames. I rather doubt it would be the ones with a naturally fiery personality. Rather its the quiet subdued ones – holding back shedloads of energy – that’s got to go somewhere right?