Varies: There is no specific dangerous heart rate during exercise. How fast your heart beats with exercise depends on a number of factors, especially your conditioning. If you are healthy, a heart reate in the 170's or even higher may be ok and tolerated.
Motion sickness caused by video games, sometimes called simulator sickness, is caused when there is a disconnect between what your eyes are seeing and what your body is feeling.
Motion sickness is sometimes referred to as sea sickness or car sickness. The symptoms of motion sickness are nausea, vomiting, dizziness, sweating, and a sense of feeling unwell. Watch your consumption of foods, drinks, and alcohol before and during travel. Avoid foods with strong odors to help prevent nausea.