In the classic story from Flash #179—"The Flash – Fact or Fiction?"—Allen is thrown into the universe eventually called Earth Prime, a representation of "our" universe, where he seeks the aid of the Flash comic book's editor Julius Schwartz to build a cosmic treadmill so that he can return home.
Dalam cerita klasik dari Flash #179—"The Flash – Fact or Fiction?"—Allen dilemparkan ke alam semesta yang akhirnya disebut Earth Prime, sebuah representasi dari alam semesta "kita", di mana ia mencari bantuan editor buku komik Flash Julius Schwartz membangun treadmill kosmik sehingga dia bisa pulang.