if you are going along side a wave how do you go back down?

this is one problem that i have now... when the conditions are good i find myself going on the face of a wave and maybe even up and over sometimes.
So.. if you lean on your inside you go up.... but while you are on the face if you lean on the backside you jsut fall off.. so how would i go back down? do i have to whip the board around?
