system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do wintergreen lifesavers spark in the dark when bitten?
gpt
Methyl salicylate absorbs ultraviolet light from excited nitrogen, and then re-emits the energy as a blue light.  This is fluorescence.

Crystallized sugar also emits a very faint light through a similar mechanism.  This is called triboluminescence.