system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: why does passing a magnet through a coil produce electricity?

I saw this on COSMOS (Michael Faraday is an unbelievable human btw) but don't get why this causes electricity. 

On a related note: when it does, and we see that spark b/c of the connection, how much energy is that (just give a simple estimate). 

Thank you. I want to understand this damn thing...
gpt
Electricity is simply the movement of electrons from one place to another. Simple as that. Magnets can induce the movement of electrons, especially in certain kinds of materials. Move some electrons and you get a difference in charge from one place to another. Place those areas close enough to each other, and they will neutralize their charges again by moving electrons via that spark.