Sex to Earthquakes: What Causes Heart Attacks (LiveScience.com via Yahoo! News)
Anger really can trigger a heart attack. But then, so can getting sick, being too hot, being too cold, air pollution, lack of sleep, grief, overeating, natural disasters, exercise and sex. In fact, simply waking up is the worst thing you can do if you're trying to avoid a heart attack. Heart attacks, strokes and cardiac arrests seem to come out of the blue, but actually most occur upon waking up …
Source: news.yahoo.com