How to Sleep - page 2
As mentioned before, when you sit down at the edge of a bed, you must be mindful to bend your knees slowly. Since the bed or the mattress is sleeping furniture or equipment which of necessity has elasticity and usually contain coils or springs, it is the action of putting down the upper half of your body forcefully that causes the springs, whose major purpose is the absorption of the energy of the impact, to release their second characteristic, i.e. recoiling, popping, as it were, the human body up on the bed, and exposing it to danger. As you put your buttocks down more@forcefully, the value p in the equation p=kx increases, where k is a constant and p is proportional to x, resulting in more bending. Because the energy retained by this bending is given by the equation E=1/2kx^2=1/2px, in rough calculation, assuming that the energy of recoiling when you sit down in normal action pops the human body up 20 cm, when you put your buttocks down three times faster, the bed will pop the human body up 60 cm. Since the velocity doubles during the fall, which indicates six times more energy, the bed pops it up 1 m 20 cm; in the third instance, 2 m 40 cm; and the forth instance, to a height of 4 m 80 cm. This will cause the body to crash against the ceiling, breaking the lighting fixtures, bringing out a more vigorous fall to the floor, causing the destruction of materials forming the floor,depression in the floor by the human body, and so on and so forth.
Once you have rested your buttocks on the edge of a bed uneventfully, then, at first you must slowly raise one of your legs that is lying near the foot end of the bed. To raise a leg, in the first instance, you need to put force into the femoral portion and the knee in the ratio of eight to two; then, leaning the upper half of your body slightly in the opposite direction to the leg almost automa tically raise it. After the leg has risen to the angle of 45 degrees, then contrarily putting a force into the femoral portion and the knee in the ratio of two to eight, you must begin to stretch your leg. At the same time (this is, as it were, an skillful and important point of this part), you must start to turn around your leg-in-the-stretching-process slowly in the direction to the foot end of the bed. Meanwhile, the upper half of your body has already started to turn to the foot end involuntarily, and when this upper part turns 45 degrees, the leg must be kept straight, and at the same time, must have descended onto the bed, which is a difficult task requiring considerable training. However, this is by no means a Herculean task, nor is it impossible.