The shaping of Cyborg was very successful, but I personally prefer the handling of Xiao Shan, a boy whose past life was full of failures and traumas, who resolutely assumed his responsibility in the face of extinction. That monologue was close to a last word, since he never used his Speed Force at full strength. But he finally did it, and the use of the speed force became stronger and stronger: the picture changed from the retrospect of a road to the retrospect of the entire scene behind him. "Make your own past" also hints that he might try to reverse his mother's death in the future like Flashpoint. Run! Barry! Run!
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