Bart Allen, also known as Impulse and later as the Flash, absorbed the Speed Force during the storyline "The Flash: The Fastest Man Alive." This event occurs when Bart is faced with an overwhelming threat and needs to tap into the Speed Force to save the day. The Speed Force is a mystical energy field that gives speedsters their incredible abilities, and absorbing it allows Bart to gain immense speed and power.
As for his speed, after absorbing


