It's all about heating and cooling... [He's distracted as he puts the skin cells onto a plastic microscope slide and covers it, pressing the sheet down over the sample. He takes out a pen and labels it as well with his own code so no one else could know who the thing belonged to.]

Heat the chocolate to the right temperature, lower it again to just before it returns to a solid, then reheat. Pour into the shapes you desire...

[He takes another cotton swab and washes it over her skin, throwing it away like he did the other. He ties a piece of rubber tubing around her upper arm, then takes out a small needle and a plastic tube with a rubber cap.]

Remove air bubbles by tapping and cool until hard.

Can you make a fist around your thumb, dear?