The force of gravity is the weakest at the equator because of the centrifugal force caused by the Earth's rotation and because points on the equator are furthest from the center of the Earth. The force of gravity varies with latitude and increases from about 9.780 m/s2 at the Equator to about 9.832 m/s2 at the poles.
Also, pharmacological therapies such as sedative-hypnotics or antidepressants have been helpful in reducing the incidence of sleepwalking in some people. Sleepwalking is common in children and is usually outgrown over time, especially as the amount of deep sleep decreases.
Re: Weed, Melanin and Dreaming. I was reading.. that there is a certain chemical in marijuana that inhibits REM sleep cycle, and one that increases REM sleep cycle. Delta 9 THC is the one that supposedly shortens REM sleep cycle, and delta 8 thc increases.