Used the clone tool to paint out the areas which will be changed
step 3 of 6
Made a selection of the leg and used the transform tool to distort it. Later added a shadow with a black brush
step 4 of 6
made several selections of the original arm and used the transform too to rotate and distort.
step 5 of 6
Cut out the other arm and used the clone tool to fill in the remainder of the arm which wasnt there.
step 6 of 6
Added the hands by first making a marquee selection and filling it. Then I used different parts of the original to form the fingers and the rest of the hand. Then added shadows with a dark brush.