How can I use the "Back" easing style?

So I am trying to make a GUI and when you press the close button, it tweens upwards off the screen, I am attempting to use the easing style “Back” but whenever I use it, it just goes in that direction, instead of nudging back and then tweening off in that direction, why is this?

Make sure the direction is out (or in). The direction determines where the “nudging” happens.

Enum.EasingDirection.Out

Doesn’t make a difference for me.