It is an example of a hyperbole.
It would be rainsford falling off the yacht because at that point you wouldn't know what is going to happen and that eventually turns into a series of events.
While not as strikingly beautiful as Cherry, Marcia is small and cute with dark hair. Two-Bit normally goes for Greaser blondes, but he really hits it off with Marcia because they are so much alike. They both have the 'same scatterbrained sense of humor. Hopefully this helps a bit
