a follow-up story four months later in The Flash #175 (December 1967). However, after the DC Universe revision after Crisis on Infinite Earths, the Flash does successfully beat Superman in a race in The Adventures of Superman #463, with the explanation that Superman is not accustomed to running at high speed for extended periods of time since flying is more versatile and less strenuous, which means the far more practiced Flash has the advantage. After Final Crisis in Flash: Rebirth #3, the Flash is shown as being significantly faster than Superman, able to outrun him as Superman struggles to keep up with him. He reveals that all the close races between them before had been "for charity". In the Smallville episode "Run", the Flash can not only run faster than a pre-Superman Clark Kent but also match Clark's top speed while running backward. While various incarnations of the Flash have proven their ability to run at light speed, the ability to steal speed from other objects allows respective Flashes to even significantly surpass this velocity. In Flash: The Human Race, Wally is shown absorbing kinetic energy, to an extent enabling him to move faster than teleportation and run from the end of the universe back to earth in less than a Planck instant. Speedsters may at times use the ability to speed-read at incredible rates and in doing so, process vast amounts of information. Whatever knowledge they acquire in this manner is usually temporary. Their ability to think fast also allows them some immunity to telepathy, as their thoughts operate at a rate too rapid for telepaths such as Martian Manhunter or Gorilla Grodd to read or influence their minds. Flashes and other super-speedsters also have the ability to speak to one another at a highly accelerated rate. This is often done to have private conversations in front of non-fast people (as when Flash speaks to Superman about his ability to serve both the Titans and the JLA in The Titans #2). Speed-talking is also sometimes used for comedic effect where Flash becomes so excited that he begins talking faster and faster until his words become a jumble of noise. He also has the ability to change the vibration of his vocal cords making it so he can change how his voice sounds to others. While not having the physical strength of many of his comrades and enemies, Flash has