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I think I just had one mistake in this chapter! gravity should be much greater than 5 times! many people don't know, but ninjas from Naruto from Chunin already surpass the speed of sound! a classic example is when Lee drops the weights, and according to data and calculations those weights, had about 2 to 4 tons (each weight) so if we multiply 5 times the gravity of an adult ninja that weighs about 100kg, it would have 500kg ! Lee was moving at sonic speeds with over 4 tons on his back! so it doesn't make sense, it's only 5 times gravity to stop the root ninjas