Conventional wisdom says no, but sometimes it’s the only way to handle a dangerous situation. Learn how to negotiate this tricky scenario. Between one and 15 percent of the population experiences occasional sleepwalking. It usually occurs during the first part of the night during NREM (non-rapid eye movement) sleep, when the muscles are not paralyzed like they during REM sleep, allowing people to move about while not being conscious of their actions. If you live with someone who sleepwalks, you know how surreal it can be and you may be unsure how best to handle it. After all, urban legend suggests that waking a sleepwalker could cause a heart attack, coma, or even brain damage….