Extraordinary gymnastics expressing movies with only shadows

It is a movie expressing a movie by the shadow painting by the original dance company "Pilobolus". Many people combine to become guns and cars, so what kind of posture is the back side of the screen is very worrisome.

Details are as below.
A high level of flexibility and toughness are likely to be required. It seems that the combination of King Slime can also be expressed.
YouTube - Pilobolus pt 2 at the oscars shadow dancers


This is the CM of HYUNDAI by the same group.
YouTube - Hyundai - Pilobolus / Life Shapes


The official website of this dance company is here. There are also pictures that show people how they are combining.
http://www.pilobolus.org/