There is many different ways. One way that I know is a way of relaxing. You sit on a sofa and imagine that your head and neck are going all floppy and relaxed. Then your shoulders, arms, stomach, legs ankles and feet in this order. Then when your feeling ultra floppy, imagine that your right arm is getting lighter and lighter and lighter while slowly raising it into the air. Then It’s heavy as a led weight and It’s sinking slowly down. Now open your eyes and you should feel all weird and floppy!