I sorta got it but... I'd like it to be more exact... it seems like its going larger than the scaleX:1, scaleY:1 part by about 10%
TweenLite.to(mc1, 4, {bezierThrough:[{x:410, scaleX:.4, scaleY:.4}, {x:160, scaleX:1, scaleY:1}, {x:-410, scaleX:.4, scaleY:.4}], orientToBezier:true, ease:Expo.easeInOut});