i really have no interest in uploading or teaching how to make this gimmick. it is difficult, time consuming and chances are you wont bother doing it anyway.
the basics are that u need to make a shell of ur chest. from your neck down to your waist
u then also need shells of both legs, but they need to be able to bend at the knees as well as stand up right on their own
clothing you will need 2 shirts that are identical as well as 2 identical pairs of jeans