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.
One possible cause of twitching biceps is fatigue after exercising. If the biceps is overstretched or used for a long period of time, it can become depleted of nutrients. This can make the muscle hyperexcitable, which means it contracts with minimal stimulation. High temperatures can also contribute to this.