Board Thread:The Flash discussions/@comment-9346948-20170426001441/@comment-3423279-20170429160329

How is any speedster a speedster?

Speed Force

The moment E-2 Ultraman snapped Oliver's neck the Speed Force acted and took him, granting him Super Speed and sending him a gajillion years into the past where he gained delusions of godhood on a separate earth, then facing Barry Allen, who he remembers as the annoying Bart Allen, and decided to make his life a living hell.

By killing the love of his life.

He, therefore, became the thing he hated, Ultraman.