Bend your legs and hips at 90 degrees and lay your arms out to the sides. Cross your left ankle over your right knee, and make sure that your hips do not rotate as your move. Push your left knee toward the wall gently, using your left hip muscles, not your hand.
The guillotine is a machine used to execute people by decapitation (chopping off their heads). A guillotine is made of a heavy blade attached to a rack, which moves up and down on a vertical frame. When the rack is let go, it will fall down and the blade will cut the convict's head off.
Although many countries that execute criminals have dispatched with the method, it's still performed by certain governments, terrorists and others. There's nothing more final than the severing of one's head. The guillotine came about because of the desire for a quick, relatively humane death.