the dictionary of psychology describes fugue as -
"From the Latin for 'flight', a psychiatric disability the defining feature of which is a sudden and unexpected leaving of home with the person assuming a new identity elsewhere.
During the fugue there is no recollection of the earlier life and after recovery amnesia for events during it.
Often called 'dissociative psychogenic fugue' to distinguish it from other syndromes that have similar symptoms but are caused by known organic dysfunctions."
I think that most people are prone to daydream at times, they wander off in their minds and imagine what they'd do with the lottery win.
But do they do it to this level? I don't think so.
It's not something I do so much anymore but I can remember that I would spend long periods of time in my imaginary world, and I'd be so immersed in it that I feel emotions and cry or laugh. It was very very real to me.
Much of this was sexual fantasy related, but when it wasn't it could be absolutely anything.
It was another world I could retreat into where I was in control. It was a nice place to be, but not a healthy one.
Go confidently in the direction of your dreams! Live the life you've imagined. As you simplify your life, the laws of the universe will be simpler.
Henry David Thoreau