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.
Other possible causes of soft bowel movements include intestinal diseases such as Crohn's disease, hypothyroidism, some cancers and diabetes. Competitive runners also often suffer from soft bowel movements, according to WebMD.