How did Sara from Samurai Champloo know about her son? In Samurai Champloo, how in the world did Sara realize her son was dead while talking to the pinwheel guy?
She had some sort of extrasensory perception, which is proven by the fact that she was blind, but still proficient in fighting. Also, she tells Fuu that she is able to sense things she cannot see, and she can sense Momo hidden in her clothes. When she fights Muugen, she tells him she can sense his anger, meaning she could somehow feel what other people feel and their states of mind.

Given the above, and the fact that she realizes that her son is dead when a pinwheel stops, I can only conclude that the stopping of the pinwheel made her realize some state of mind/feeling coming from the pinwheel merchant (something she was not aware of before), which in turn made her realize her son was dead.



Although this is speculation, it is the only thing that seems plausible to me. However, the stopping of the pinwheel may have some deeper meaning that I am not aware of.