Sometimes when you sneeze or stare at a bird too long or just gap out you really aren’t there at all.
What is really happening is that you have been transported into someone’s dream either as yourself or as a walkon ( part of a mob,a person walking by etc…).
Since dreams only last for seconds no one notices .
Some folks like actors and musicians get dreamed of quite frequently and so they “go missing “
sometimes for days.
The ones that figure it all out never talk about it .