Giving Life To A Drawing.
Oscillation is just one pattern of movement for making things appear to have life. You can use it in many different ways, such as in the Rolling Hills aspect of flipbooks, as an oscilloscope in those flippers, which are quite good, or many other processes and scopes of creating amazing drawings.
Go for it! I'm sure it seems confusing but if you think about it, it's not. Your mind is just trying to grasp the parameters of how complicated it can think. And by pushing the limits of what it is capable of, you can help yourself become smarter.