The Flash mod is actually part of the Super Heroes series Mod for GTA 5, which includes the popular Spiderman Mod with grappling hook capability.

The mod lets you walk on water and run up walls, but those colored streaks that trail behind Flash? That's the real killer feature.

In the 10 years since Grand Theft Auto V‘s release, the game has seen a number of exciting mods, some of which even allow players to explore Los Santos as various superheroes. Modder JulioNIB ...

Again, JulioNIB's The Flash Version 2.0 script is for now a WIP mod, however their turnover after first tease is typically fast. Check out more of the creator's work via their blog and Pateron pages.