A personal experience example: I was awake and back in my hospital room after being in surgical ICU for the typical 24 hours or so. I remember picking up the phone in my room to call someone at a number I knew by heart. I think I tried 6 times before giving up. I don't really remember who or why I wanted to call them, but I vividly recall the misdials and retries. To date it's the weirdest post-op memory I have.