Electric Toothbrush Trouble

So, I found a brand new electric toothbrush in our family bathroom cabinet...so, I claimed it as my own. However, I had never brushed with one before. Are you supposed to brush normally, back and forth...or does it not work that way? Are you supposed to just move from tooth to tooth and let the vibrations do everything? Do you jump around and do the hokey-pokey? I just don't know.
And, it's not even one of those where the whole head of the toothbrush moves, but only little plastic "antennae" (I can't think of the right word), occasionally move up and down...to remove stuff in your gums...I assume. I don't know. Conundrum.