Help With Recreating Swing In Motion

Hello I am trying to figure out how I can recreate the swing in motion seen in the video with body movers (no tweening or animation). I have already finished the rappel system but I just can’t figure out how to make the player swing in through a window with the same motion seen in the video.

Here is the video referencing what I am talking about:

Any help is highly appreciated!

Note: To be more clear my goal is to simply achieve the swing in motion, nothing else.