I once heard that if all the people in china jumped at once, a rediulously huge tidal wave would come and cover most of California if not more 
You have to be kidding me, right? 
Maybe instead of buying bombs and wasting millions of dollars we could all just jump and take out Japan! :smack:
http://www.straightdope.com/classics/a1_155
That should give you a basic idea of the idea.
No, no, no… it wouldn’t cause a tidal wave… the Earth’s orbit would be changed, and within a few years, we would fall into the Sun.
Is that when the Vulcans are planning to take over? 
Mr.duffer, report to the brig immediately.
Damn, I knew I was pushing my luck cower :eek:
Well, I’ve heard that all the people on earth would fit into a cube about 2.5 miles on each side. Assuming a world population of 6 billion and a Chinese populations of 1.3 billion, that works out to a cube ~1.5 miles on each side (it’s late, so my math may be incorrect). An asteroid that big hitting the ocean would cause a pretty big tidal wave. Of course, there is the small matter of convincing the Chinese people to get into a gigantic cube, and then driving said cube into the ocean at 30,000 miles per hour. Still, I guess it’s theoretically possible.
The question I’ve always had, though, is: If the Chinese all farted at the same time, would it cause the polar ice caps to melt?
Hmm, now that I think of it, asteroids are usually made up of iron and nickel and whatnot, which is probably denser than the average human, so we probably need to take that into account. I’m not going to do it, though. 