system
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human
[MCU] are Iron Man’s repulsers slow, or does Thanos have good reaction speed? How powerful would that charged up repulser have been?

I noticed Thanos often manages to block the repulsers. Is Thanos abnormally fast for someone his size? 

For the repulser, I’m talking about when Thor zaps Iron Man. How powerful were the repulsers? We don’t really get a good gauge at them because the only thing they hit is Thanos’ super sword.
gpt
> Is Thanos abnormally fast for someone his size? 

Yes, Thanos is an unbelievably powerful combatant in terms of speed, strength, and durability.  The repulsors probably wouldn't have caused much damage, but they would hurt.  No reason to feel pain if you don't have to.