“I feel like I’m diagonally parked in a parallel universe”—that is, confused or disoriented—is a one-line saying that has been printed on many images. The saying has been cited in print since at least 1996. Authorship is unknown.
 
         
Google Books
Modems for Dummies
By Tina Rathbone
Foster City, CA: IDG Books Worldwide
1996
Pg. 290:
Diagonally parked in a parallel universe.
 
20 August 1997, The Arizona Republic (Phoenix, AZ), Glendale/Peoria Community, pg. 2, col. 1:
From our e-mail files, we’ve compiled a list of the top two sayings that would make great bumper stickers:
 
1. I feel like I’m diagonally parked in a parallel universe.
2. Honk if you love peace and quiet.
 
Google Groups: alt.support.depression
I feel like I’m diagonally parked in a parallel universe.
Veronica
11/10/97
Cough, sneeze, sniffle…..
I better get some rest. 
 
28 December 1997, The Record (Bergen County, NJ), “Pepsi brings your ancestors back from the grave?” by Bill Ervolino, pg. y2:
Bumper stickers
Be nice to your kids, they choose your nursing home.
I’m diagonally parked in a parallel universe.
 
Google Books
Winning the Information Game:
Seven Steps to Market Domination
By Frederick W. Timmerman
Provo, UT: Executive Excellence Publishing
2000
Pg. 45:
“I feel like I’m diagonally parked in a parallel universe!” or “The sooner you fall behind the more time you’ll have to catch up!”
 
OCLC WorldCat record
Diagonally-parked in a parallel universe : working through social anxiety
Author: Signe A Dayhoff
Publisher: Placitas, N.M. : Effectiveness-Plus Publications, ©2000.
Edition/Format:   Print book : English
Database: WorldCat
Summary:
You will discover how to significantly and effectively: reduce your fear of evaluation, negative thinking, anger, and embarrassment. Raise your self-confidence and social effectiveness at work and play. Say good-bye to your loneliness, make friends, and date more comfortably. Control you stress and deal with criticism, disagreements, and rejection. Make the impression on others you want them to have. Create your own career opportunities
     
Google Books
Pastor Tim’s Cleanlaugh Collection
By Tim Davis
Victoria, BC: Trafford Publishing
2001
Pg. 19:
I feel like l’m diagonally parked in a parallel universe.
 
Google Books
Humor for All Ages, Occasion and Celebrations
By Mel Bergstresser
Xlibris Corporation (Xlibris.com)
2013
Pg. 111:
I feel like I’m diagonally parked in a parallel universe.
 
Google Books
The Official Rules:
5,427 Laws, Principles, and Axioms to Help You Cope with Crises, Deadlines, Bad Luck, Rude Behavior, Red Tape, and Attacks by Inanimate Objects
By Paul Dickson
Mineola, NY: Dover Publications, Inc.
2013
Pg. 168:
I feel like I’m diagonally parked in a parallel universe.
(“Jackson’s Basic Truths” by Hiram Jackson.—ed.)

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I feel like I’m diagonally parked in a parallel universe.
4:00 PM - 19 Jan 2017