Gintama - episode 67 - 01 Aug, 2007

Gintoki gets robot puppeteer Gengai Hiraga to fix his bike. But when Gintoki tries to leave Gengai's shop without paying the repair bill, Gengai activates the modification he had secretly made. Gintoki loses control of his scooter and crashes it into another scooter belonging to Amanto express messenger Noriko Mach. Now Noriko is injured and unable to ride her bike. But it turns out she has a special physical condition. (Source: Crunchyroll)