I chose sleepwalking because I myself have sleepwalked before and have seen many friends sleepwalk so I was interested to know more about it. It is important because it is quite common for people to sleepwalk although with the teen years the chance to sleepwalk decreases. Sleepwalking (aka somnambulism) is a sleeping disorder which makes people get up and do something while still in sleep. This might mean from sitting up in bed to wandering around outside. It mostly happens during the deeper sleep of sleeping stage 3 and 4. A full sleeping cycle is made of stage 1, 2, 3, 4 and REM (rapid eye movement).
Sleepwalking can run in your family so if you have a parent or a sibling who sleepwalks you have a higher chance of sleepwalking yourself. It can also be caused by things like lack of sleep or irregular sleep and sometimes even because of stress. No, sleepwalking is not dangerous at all. Most people who sleep walk just stand up and walk around. But there still are dangers such as falling down stair, bumping into something or falling of something. It is said that waking sleepwalkers up will confuse them and give them a bad mood. So if you encounter a sleepwalker slowly guide him back to his bed.