system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do I have to eject an external disk before unplugging it?
gpt
Little Jimmy is coloring a picture with his crayons. If you yank the piece of paper away from him while he's thinking of what to draw next, it won't cause any problems.  But if you happen to pull the piece of paper away while he still has his crayon touching the paper, you'll ruin his picture.