system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why is it so hard to grip things tightly right after you wake up?
gpt
While you sleep, your body makes a chemical that helps keep you motionless during your active dreaming. In some people this can take a few seconds or minutes to end when you wake up. This can sometimes do things like you are describing.

In its scariest form, there are people who wake up paralyzed every morning!