Flashtime

"Flashtime", as nicknamed by Cisco Ramon, is a phenomena that occurs when time slows down relative to a speedster so as to make it appear as if everything else is at a complete standstill. Flashtime is relative to a certain speed, rather than speedsters themselves, as it is possible for non-speedsters to be brought into it, allowing them to converse and move with speedsters at their heightened speed. However, as the individuals are moving at such an intense rate, these non-speedsters can only stand to be in Flashtime for so long, as their bodies are not tuned to operating at such speed high speeds.

Entering Flashtime is also highly dangerous for speedsters themselves. Operating at such speed drains the speed energy within their bodies faster than their connections to the Speed Force can replenish it, therefore they too can only stay in Flashtime for so long before they begin to slow down. If they do not stop willingly before all their speed energy is used up, they lose their powers altogether. How long a speedster can last in Flashtime varies depending on age and/or the strength of their connection to the Speed Force; Jay Garrick only lasted a short time due to his advanced age and Jessie Quick for just a bit longer due to her only being a speedster for a short time. Barry Allen was able to last longest of all but even he eventually came close to cracking after ages in Flashtime.

While speedsters in general can access Flashtime, only Barry Allen has shown the ability to be able to bring others into it, later attributing this to his long time in the Speed Force.

History
When Iris was about to reveal his secret as the Flash to the public during his trial, Barry Allen stopped her, accidentally causing her to move at the same heightened rate as him so that he could tell her not to do it.

After a nuclear explosion went off, Barry and Jesse Wells entered their heightened state, searching for a way to reverse the problem. Barry went through all of their friends, Cisco Ramon referring to it as "Flashtime", to try and find a solution, even sending Jesse to Earth Three to enlist Jay Garrick's help in solving the predicament. At the time, Barry could only keep each of his non-speedster allies in Flashtime for a few moments at a time before their metabolisms couldn't cope with the acceleration, forcing Barry to let them return to normal time, with each of them collapsing once Barry, Jesse and Jay stopped the explosion and returned to normal perception.

After Clifford DeVoe took over the Castle and made Neil Borman go radioactive, Barry trained Caitlin Snow and Cisco Ramon to utilize Flashtime, allowing them to use Flashtime without tiring as quickly as the had previously, using it to assist Barry in saving DeVoe's hostages while Barry himself attempted to foil DeVoe's plans.

From Earth One

 * Iris West-Allen
 * Caitlin Snow
 * Cisco Ramon

From Earth Two

 * Harry Wells

Season 4

 * "The Trial of The Flash"


 * "Enter Flashtime"


 * "Think Fast"


 * "We Are The Flash"

Season 5

 * "Elseworlds, Part 1"

Use in comics
In the comics, it was Wally who first mastered the art of sharing 'Flashtime' with others rather than Barry. He used this on various occasions when he was facing particularly large-scale problems, ranging from sharing his speed with Captain Cold and Mirror Master in his first solo confrontation with Brother Grimm to even granting Superman accelerated speed so that he could save Adam Strange's wife Aleena while she was being held hostage by an alien race.