A Certain Scientific Railgun - Episode 010 - Silent Majority
Ruiko uses the Level Upper on herself and her friends, becoming happy to have an ability. Meanwhile, Kuroko takes care of more Level Upper offenders and gains more injuries in the process, keeping them a secret from Mikoto. Remembering when they ate shaved ice, Mikoto and Kuroko come to the conclusion that the Level Upper is using synesthesia to manipulate multiple senses with just audio. Kazari soon hears from Ruiko that her friends have fallen unconscious due to the Level Upper, later finding her unconscious too. After Ruiko is admitted into hospital, Mikoto feels guilty for not understanding her feelings and asks to co-operate with Judgment in finding the culprit. They later learn from a frog-faced doctor (Heaven Canceler) that the Level Upper victims seem to share a brainwave pattern with someone. With the help of Mii, they theorize that Level Upper actually connects ability users like a network and discover the culprit to be none other than Harumi. Kazari, who had visited Harumi earlier and discovered her notes on synesthesia, is taken hostage by her. Noticing Kuroko's injuries, Mikoto goes by herself to rescue Kazari and stop Harumi.