But at this point right over here, when we are about, it looks like, five meters behind our starting point, we start going forward again. But right at that moment, we are going neither forward nor backwards. It's right at that moment where we just finished going backwards and we're about to go forward. And one way to think about it is, what would be the slope of the tangent line at that point? And the slope of the tangent line at that point would be horizontal. And so this is neither. So we can use that same technique to think about this point.