Tweenlite can tween frames backwards (against the timeline)

My buddy Zach discovered it, awesome find!

Yup… If you are currently on frame 20 of a movieclip and you fire this tween code, you will tween backwards to frame 1. Easing is even supported, very nice.

TweenLite.to( yourClip, 1, { frame:1, ease:fl.transitions.easing.None.easeNone } );