Barry Allen is the fastest man alive, tapped into the Speed Force—an extradimensional energy source that allows him to move, think, and react at speeds that make light look slow. He can vibrate through solid matter, time-travel by running fast enough, and has literally outrun the concept of Death itself. The only reason every fight doesn't end in one femtosecond is because Barry is too nice to end it that quickly.

The angrier he gets, the stronger he gets—and Bruce Banner's gamma-irradiated alter ego has gotten angry enough to crack continents and punch through dimensions. The Hulk's strength has literally no known upper limit, he regenerates from virtually any wound, and his thunderclap can level city blocks. The only thing scarier than fighting the Hulk is the realization that he hasn't even started trying yet.