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Let’s say you get in a fight with Superman and he, not in a particularly merciful mood, decides not to hold back and punches you with all his might. Depending on which Superman lore you consult (different writers gave Superman different powers), Kal-El in some plotlines can move near the speed of light. So what happens if a fist flies at you at the speed of light? According to Jake, the physics-minded narrator of the video, the energy released by Superman’s fist would be around 80 trillion kelvin, which is 5 million times hotter than our sun.
