system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 How does lightning makes mushrooms multiply?
gpt
It can place stress on them that signals they should hurry up and get into their reproductive phase before they die.

If mushrooms were directly hit by the lightning that would be too much for them to handle. However, mushrooms in the wild tend to grow on wood, and the structure of wood is such that it can be hit by lightning and absorb most of the punishment.