Man, I haven’t laughed so hard in ages.
xkcd’s Randall Munroe does the math.
The answer turns out to be “a lot of things”, and they all happen very quickly, and it doesn’t end well for the batter (or the pitcher).
Other important need-to-know questions are answered such as how much Force power Yoda has. Turns out it’s about as much as a Smart Car…
The site’s in the blogroll under “What if?”