What we have here is something called triboluminescence or TL. Simply put, triboluminescence is light resulting from crushing or tearing.
Provided by methyl salicylate (oil of wintergreen), when the sugar crystals in the Life Savers get crushed, electrons break loose and scatter all over creation. The electrons begin to get lonesome for the sugar crystals they broke free from, and decide to return. Problem is that nitrogen molecules took their place and the electrons crash into the nitrogen - causing little blue sparks.
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