The Zoldyck family owns and lives at Kukuroo Mountain, a dormant volcano in the Dentora region of the Republic of Padokia, which stands 3,772 meters. Their estate is surrounded by huge stone walls guarded by a giant dog named Mike and attendants highly skilled in martial arts.
The position in which you sleep can cause your calf muscles to twitch severely. If you are in the habit of sleeping on one side with your knees bent at an angle, and your toes pointing straight, or downwards, there is a high probability that you may be caught unawares by cramps.
Cramping in the calves has several causes, but the true cause is not fully understood. Your history will likely give the most clues. True muscle cramps involve intense muscle contraction and the muscle needs to be lengthened to resolve the spasm. This differs a bit from calf pain from causes other than cramping that results in muscle spasm. Exercise-related cramps are likely caused by muscle fatigue and may involve the Golgi tendon bodies, which normally fire to inhibit the muscle from contracting too hard.