Shito! Kyofu no kokushiken - S1-E11
Stupidity: The 'repairing the cloth' scene does not make any sense as presented. Shiryu cuts his wrists and just pours blood on the armors spilling it before he reaches them (one just assumes that Mu told him off-screen that he needed to bleed all over the armors and not collect it, would have been pretty awkward if he died hemorrhaging before Mu could fetch a bowl), and he keeps saying that he just needs to repair Seiya's armor. Since Mu says that he needs half of Shiryu's blood to repair BOTH armors and he'll die if he loses a third, Shiryu could repair Seiya's armor and go fight armorless - which he always does anyway, he's arguably stronger without it - giving just 1/4 of his blood, instead of dying leaving Seiya on his own. No need to expect a character from a 'shonen' to act logically, but simply a throwaway line saying that he needed to repair his own armor out of duty to his stars or something similar, would have been enough.