system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: That weird "out of body" feeling

What exactly is that weird kind of feeling you sometimes have when you're standing or walking? It feels like being extremely lightweight or flying.
gpt
You might be referring to something called disassociation. It's quite common and can range anywhere from day dreaming to total amnesia. On the more severe side, it's usually caused by some sort of stress or trauma and is a coping mechanism by the brain.