system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 Why is it easier to get out of the bed when you wake up in the middle of the night instead when alarm wakes you?
gpt
When you spontaneously wake up you've already passed from deep sleep into light sleep and then into an aware state.  You go from "almost awake" to "awake" and it's no big deal.

When an external force blasts you awake there's no guarantee that you were in light sleep.  You may have been in deep sleep or mid-REM cycle that was suddenly rudely interrupted and the brain isn't quite ready for this bullshit yet.