When you're exhausted and can physically feel yourself start to pass out and dream. Knowing you're gonna be asleep within minutes.
*lays down on couch*
"Welp, that workout gave me some sleep momentum"
*sleeping within 2 minutes*
When you wake up from an intense nap and have marks and lines on parts of your body
John woke up from a 3 hour nap and saw nap tattoos on his arms
When you reach for a object that isn't there purely out of habit
Mike recently quit smoking and reached for a cigarette that was no longer in his pocket.
Mike: shit man, I just did a Phantom Grab