Flashtime

Temporal dilution, nicknamed by Cisco as "Flashtime", is the ability to generate enough energy, thereby slowing down time relative to a speedster to a complete standstill. This ability, when combined with Speed Force sharing also lets other people who isn't/is a speedster converse and move with them at their heightened speed. But if this is not used to people who is not speedster, they will get tired and furthermore, they'll get acute hypoglycemia.

The only ones who can do that are Barry Allen/The Flash and Jay Garrick. But, Jay Garrick can't let other people converse with him at his heightened speed.