A variation on The Stranger. Involves, in addition to sitting on your hand until it becomes numb, also painting the nails on that hand. You then have a seat in a dark room or closet and use your free hand to shine a flashlight on the hand with the painted nails while you masturbate.

When you eat dirt for the first time and leave your family to build a shack in the woods

When a man paints the nails on his non-dominant hand red, sits on this hand until it goes numb, raises one leg (same side as hand), reaches under raised leg with non-dominant/painted hand and proceeds to jerk off. (the Ultimate Stanger can be performed sitting or standing) GIDDY UP!

When, after having two non-functioning arms for a period of time, you have an arm transplant procedure and use the new arms to pleasure yourself.

Note: This has to be done before full nerve growth occurs or it just isn't "ultimate".