Seems like it is missing the point of a chain reaction, where you heat something up to the point that it starts to self combust. Like this meteor that reaches a specific temperature and suddenly splatters to pieces.
Some goes for the LHC if you start to illuminate matter at one point up to splatter-temperature, and set off a chain reaction. The planet already contains all the energy to ignite our sol.
Or like a balloon being pricked, the tiny needle, input energy, releasing all the build up energy, bam!
Here is the clip of the balloon being popped:
… and the remnant:
Dance, even if you have nowhere to do it but your own living room. Wear Sunscreen by Baz Luhrmann - Mary Schmich