Speed of Darkness

As Barry and the new Kid Flash rescue people from a collapsing bridge, the original Wally West shows up to help them. When the two Wallys touch, Barry experiences speed force feedback and sees visions of a possible future and behaves arrogantly, seemingly momentarily possessed by Prof. Zoom. Under the influence of Zoom, Barry reveals to the second Wally that his uncle Daniel, the Reverse Flash, is in reality Wally's father. Upset at this revelation, and that Barry had withheld this information from him previously, the second Wally storms off, but is consoled by the original Wally.