Sangeet Prabhaker is a prosthetic and creature effects artist and he's showing off some of the work done from Game of Thrones. Here's how he made Jaime Lannister's handless arm:



He keeps his real arm wrapped underneath!


But since he's not always in the same clothes, he's got to have different arms:

He's also done some amazing work on Catelyn Stark too:


And Stannis' daughter: