Deliberate spontaneous combustion would be an incredibly useful tool, provided one could survive the ensuing explosion and that it caused significant propulsion in a direction of choice. Jolly good news for the star of Explodemon! who has such powers and is therefore able to navigate the obstacle-laden levels in which he finds himself. The game is available now, after a prolonged vacation in PSN country, and looks like a cross between Megaman and Splosion Man. There's an interesting piece on the latter similarity here, and a bright and boomy trailer below.
I hear good things about the PSN version and it looks like there's enough variety to keep things interesting. The price is £7.99 and you can buy direct from the developers site, Impulse and Gamersgate.
Back in the day, the only things that exploded were barrels, I'm sure of it. And they were clearly painted to communicate their function. Now protagonists are at it? World gone mad.